Conversion of units

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Conversion of units

Conversion of units refers to conversion factors between different units of measurement

Units of measurement

The definition, agreement and practical use of units of measurement have played a crucial role in human endeavour from early ages up to this day....
for the same quantity

Quantity

Quantity is a kind of property which exists as magnitude or multitude. It is among the basic classes of things along with Quality , substance, change, and relation....
.

Tables of conversion factors
This article gives lists of conversion factors for each of a number of physical quantities, which are listed in the index.

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Encyclopedia

Conversion of units refers to conversion factors between different units of measurement

Units of measurement

The definition, agreement and practical use of units of measurement have played a crucial role in human endeavour from early ages up to this day....
for the same quantity

Quantity

Quantity is a kind of property which exists as magnitude or multitude. It is among the basic classes of things along with Quality , substance, change, and relation....
.

Techniques

Rounding of results

The process of making a conversion cannot produce a more precise result than the original quoted figure. Appropriate rounding of results is normally performed after conversion. (See significant figures

Significant figures

The significant figures of a number are those Numerical digit that carry meaning contributing to its accuracy . This includes all digits except:...
).

Tables of conversion factors

This article gives lists of conversion factors for each of a number of physical quantities, which are listed in the index. For each physical quantity, a number of different units (some only of historical interest) are shown and expressed in terms of the corresponding SI

Si, si, or SI may refer to :...
unit.

Legend

Legend
Symbol	Definition
=	exactly equal to
˜	approximately equal to
	digits repeat infinitely (e.g. corresponds to )
(H)	of chiefly historical interest

Luminance

Luminance
Luminance

**Luminance** is a Photometry measure of the luminous intensity per unit area of light travelling in a given direction. It describes the amount of light that passes through or is emitted from a particular area, and falls within a given solid angle....
Name of unit	Symbol	Definition	Relation to SI Si Si, si, or SI may refer to :... units
candela per square metre (SI base unit SI base unit The International System of Units defines seven dimensional analysis SI base units. All other physical units can be derived from these base units: these are known as SI derived units.... )		= cd/m²	= 1 cd/m²
lambert Lambert (unit) The lambert is a unit of luminance named for Johann Heinrich Lambert , a German mathematician, physicist and astronomer. A related unit of luminance, the foot-lambert, is used in the lighting, cinema and flight simulation industries....	L	= (10⁴/p) cd/m²	˜ 3183.09886 cd/m²

Length

Length
Length

**Length** is the long dimension of any object. The length of a thing is the distance between its ends, its linear extent as measured from end to end....
Name of unit	Symbol	Definition	Relation to SI Si Si, si, or SI may refer to :... units
metre Metre The metre or meter is a Unit of measurement of length. It is the SI base unit of length in the metric system and in the International System of Units , used around the world for general and scientific purposes.... (SI base unit SI base unit The International System of Units defines seven dimensional analysis SI base units. All other physical units can be derived from these base units: these are known as SI derived units.... )	m	= Distance light travels in 1/299 792 458 of a second in vacuum	= 1 m
ångström Ångström An ?ngstr?m or angstrom is an internationally recognized non-SI unit of length equal to 0.1 nanometre or 1 metres. It is sometimes used in expressing the sizes of atoms, lengths of chemical bonds and optical spectrum, and dimensions of parts of integrated circuits....	Å		= 0.1 nm
astronomical unit Astronomical unit An astronomical unit is a unit of length based on the mean distance from the Earth to the Sun. The precise value of the AU is currently accepted as 149,597,870,691 Plus-minus sign 6 metres ....	AU	˜ Distance from Earth to Sun	˜ 149 597 871 464
bohr, atomic unit of length Atomic units Atomic units form a system of units convenient for atomic physics, electromagnetism, and quantum electrodynamics, especially when the focus is on the properties of electrons....	a₀	= Bohr radius Bohr radius In the Bohr model of the structure of an atom, put forward by Niels Bohr in 1913, electrons orbit a central atomic nucleus. The model says that the electrons orbit only at certain distances from the nucleus, depending on their energy.... of hydrogen
barleycorn Barleycorn Barleycorn may mean:* a grain of barley* English unit of length equal to 1/3 inch* "John Barleycorn", an ancient folksong* William Barleycorn, a Primitive Methodist missionary in Fernando Po... (H)		= ? in (see note above about rounding)	˜ 0.008 m
cable length (Imperial)		= 608 ft	= 185.318 4 m
cable length Cable length A cable length or cable's length is a nautical Units of measurement of measure equal to one tenth of a nautical mile or 100 fathoms, or sometimes 120 fathoms.... (International)		= 1/10 nmi	= 185.2 m
cable length (U.S.)		= 720 ft	= 219.456 m
chain Chain (unit) A chain is a Units of measurement of length; it measures 66 foot or 22 yard or 100 Link . There are 10 chains in a furlong, and 80 chains in one statute mile.... (Gunter's Edmund Gunter Edmund Gunter , England mathematician, of Wales descent, was born in Hertfordshire in 1581.He was educated at Westminster School, and in 1599 was elected a student of Christ Church, Oxford.... ; Surveyor's)	ch	= 66 ft = 4 rods	= 20.116 8 m
cubit (H)		= Distance from fingers to elbow ˜ 18in	˜ 0.5 m
ell (H)	ell	= 45 in	= 1.143 m
fathom	fm	= 6 ft	= 1.828 8 m
fermi	fm
finger		= 7/8 in	= 0.022 225 m
finger (cloth)		= 4 ½ in	= 0.114 3 m
foot (Benoît)(H)	ft (Ben)		˜ 0.304 799 735 m
foot (Clarke's; Cape)(H)	ft (Cla)		˜ 0.304 797 265 4 m
foot (Indian)(H)	ft Ind		˜ 0.304 799 514 m
foot (International)	ft	= ? yd = 12 inches	= 0.304 8 m
foot (Sear's)(H)	ft (Sear)		˜ 0.304 799 47 m
foot (U.S. Survey)	ft (US)	= 1 200/3 937 m	˜ 0.304 800 610 m
french French catheter scale The French catheter scale is commonly used to measure the outer circumference of cylindrical medical instruments including catheters. In the French Gauge system as it is also known, the diameter in millimeters of the catheter can be determined by dividing the French size by 3, thus an increasing French size corresponds with a larger... ; charriere	F	= ? mm	3 m
furlong Furlong A furlong is a measure of distance in imperial units and U.S. customary units. It is equal to one-eighth of a mile, 220 yards, 660 foot or 201.168 meters....	fur	= 10 chains = 660 ft = 220 yd	= 201.168 m
geographical mile Geographical mile The geographical mile is a unit of length determined by 1 minute along the Earth's equator, approximately equal to 1855.325 metres . Any greater precision depends more on choice of standard than on more careful measurement: the length of the equator in the World Geodetic System WGS-84 is 40,075,016.6856 m which makes the geographical mile 1... (H)		= 6 082 ft	= 1 853.793 6 m
hand		= 4 in	= 0.101 6 m
inch Inch An inch is the name of a Units of measurement of length in a number of different systems, including Imperial units, and United States customary units....	in	= 1/36 yd = 1/12 ft	= 0.025 4 m
league League (unit) A league is a Units of measurement of length or area long common in Europe and Latin America, although no longer an official unit in any nation.... (land)	lea	= 3 US Statute miles	= 4 828.032 m
light-day		= 24 light-hours
light-hour		= 60 light-minutes
light-minute		= 60 light-seconds
light-second Light second A light-second is a unit of length. It is defined as the distance light travels in an absolute vacuum in one second or 299,792,458 metre. Note that this value is considered exact, since the metre is actually defined in terms of the light second....		= Distance light travels in one second in vacuum
light-year	l.y.	= Distance light travels in vacuum in 365.25 days
line	ln	= 1/12 in (Klein 1988, 63)	= 0.002 116 m
link (Gunter's; Surveyor's)	lnk	= 1/100 ch	= 0.201 168 m
link (Ramsden's; Engineer's)	lnk	= 1 ft	= 0.304 8 m
mickey		= 1/200 in
micron Micrometre A micrometre or micron is one Micro- of a metre, or equivalently one thousandth of a millimetre. It is also commonly known as a micron....	µ
mil; thou Thou (unit of length) A thou, also known as a mil or point, is a Units of measurement of length equal to 0.001 inch . It is sometimes used in engineering and in the specification of:...	mil
mil Norwegian/Swedish mil A mil is a Units of measurement of length, usually used to measure geographic distance, fairly common in Norway and Sweden. Today, it measures by definition 10 kilometres, but earlier in history it had different values.... (Sweden and Norway)	mil	= 10 km	= 10 000 m
mile Mile A mile is a Units of measurement of length, usually used to measure distance, in a number of different systems. In contemporary English contexts, mile most commonly refers to the statute mile of 5,280 Feet or the nautical mile of 1,852 meters ....	mi	= 1 760 yd = 5 280 ft = 80 chains	= 1 609.344 m
mile Mile A mile is a Units of measurement of length, usually used to measure distance, in a number of different systems. In contemporary English contexts, mile most commonly refers to the statute mile of 5,280 Feet or the nautical mile of 1,852 meters .... (U.S. Survey)	mi	= 5 280 ft (US Survey feet)	= 5 280 × 1 200/3 937 m ˜ 1 609.347 219 m
nail (cloth)		= 2 ¼ in	= 0.057 15 m
nautical league	NL; nl	= 3 nmi	= 5 556 m
nautical mile Nautical mile A nautical mile or sea mile is a unit of length. It corresponds approximately to one minute of arc of latitude along any meridian .It is a non-International System of Units unit used especially by navigators in the shipping and aviation industries.... (international)	NM; nmi	= 1 852 m	= 1 852 m
nautical mile Nautical mile A nautical mile or sea mile is a unit of length. It corresponds approximately to one minute of arc of latitude along any meridian .It is a non-International System of Units unit used especially by navigators in the shipping and aviation industries.... (Admiralty)	NM (Adm); nmi (Adm)	= 6 080 ft	= 1 853.184 m
pace		= 2.5 ft	= 0.762 m
palm		= 3 in	= 0.076 2 m
parsec Parsec The parsec is a units of measurement of astronomical units of length, equal to just under 31 orders_of_magnitude_#1012 kilometres , or about 3.26 light-years....	pc	Distance of star with *parallax shift of one arc sec*ond from a base of one astronomical unit
point (ATA)	pt		= 0.000 351 459 8 m
point (Didot; European)	pt
point (metric)	pt	= 3/8 mm
point (PostScript PostScript PostScript is a dynamically typed concatenative programming language programming language created by John Warnock and Charles Geschke in 1982. PostScript is best known for its use as a page description language in the electronic and desktop publishing areas.... )	pt	= 1/72 in	= 0.000 352 7 m
quarter		= ¼ yd	= 0.228 6 m
rod Rod (unit) The rod is a unit of length equal to 5.5 yards, 11 cubits, 5.0292 meters, 16.5 foot , or of a statute mile. A rod is the same length as a perch and a pole.... ; pole; perch (H)	rd	= 16 ½ ft	= 5.029 2 m
rope (H)	rope	= 20 ft	= 6.096 m
span (H)		= 9 in	= 0.228 6 m
spat
stick (H)		= 2 in	= 0.050 8 m
pm Picometre A picometre is a Units of measurement of length in the metric system, equal to one trillionth of a meter, which is the current International System of Units SI base unit of length.... , stigma, or bicron
telegraph mile Mile A mile is a Units of measurement of length, usually used to measure distance, in a number of different systems. In contemporary English contexts, mile most commonly refers to the statute mile of 5,280 Feet or the nautical mile of 1,852 meters .... (H)	mi	= 6 087 ft	= 1 855.317 6 m
twip Twip For the podcast "This Week in Photography" see This Week in PhotographyA twip is a typography measurement, defined as 1/20 of a point . One twip is 1/1440 inch or 17.639 ?m when derived from the PostScript point at 72 to the inch, and 1/1445.4 inch or 17.573 ?m based on the printer's point at 72.27 to the inch....	twp	= 1/1 440 in	8 m
x unit X unit The X-unit is a Units of measurement of length formerly used to measure the wavelength of X-rays and gamma rays. The X-unit is approximately 1.0021 metre.... ; siegbahn Siegbahn Siegbahn is the surname of:* Kai Siegbahn , Swedish physicist, Nobel Prize in 1981* Manne Siegbahn , Swedish physicist, Nobel Prize in 1924siegbahn may refer to:...	xu
yard Yard A yard is a Units of measurement of length in several different systems, including English units, Imperial units, and United States customary units.... (International)	yd	= 0.914 4 m = 3 ft = 36 in	= 0.914 4 m

Area

Area
Surface area

**Surface area** is how much exposed area an object has. It is expressed in square units. If an object has flat Face , its surface area can be calculated by adding together the areas of its faces....
Name of unit	Symbol	Definition	Relation to SI Si Si, si, or SI may refer to :... units
acre Acre The acre is a Units of measurement of area in a number of different systems, including the Imperial unit#Measures of area and United States customary units#Units of area systems....	ac	= 10 sq ch = 4840 sq yd	= 4046.856 422 4 m²
are Are Are is a unit of area, equal to 100 square metres , used for measuring land area. It was defined by older forms of the metric system, but is now outside of the modern SI ....	a		= 100 m²
barn Barn (unit) A barn is a unit of area. While the barn is not an SI unit, it is accepted for use with the SI. Originally used in nuclear physics for expressing the cross section area of nuclei and nuclear reactions, today it is used in all fields of particle physics to express the cross sections of any scattering process....	b		= 10^-28 m²
barony		= 4000 ac
board	bd	= 1 in × 1 ft
boiler horsepower equivalent direct radiation	bhp EDR	= (1 ft²) (1 bhp) / (240 BTU_IT/h)	˜ 12.958 174 m²
circular inch Inch An inch is the name of a Units of measurement of length in a number of different systems, including Imperial units, and United States customary units....	circ in	= p/4 sq in
circular mil; circular thou	circ mil	= p/4 mil²
cord		= 192 bd	= 1.486 448 64 m²
dunam Dunam A dunam or d?n?m, dunum, donum is a Units of measurement of area used in the Ottoman Empire and still used, in various standardized versions, in many countries formerly part of the Ottoman Empire....		= 1000 m²	= 1000 m²
hectare Hectare A hectare is a unit of area equal to , or one square hectometre , and commonly used for surveying.The hectare is used in most countries around the world, especially in domains concerned with land ownership, land planning, and land management, including law , agriculture, forestry, and town planning....	ha	= 10 000 m²	= 10 000 m²
hide Hide (unit) The hide was a unit used in assessing land for liability to "geld", or land tax, in History of Anglo-Saxon England from the 7th to the 11th centuries....		= 100 ac
rood	ro	= ¼ ac	= 1011.714 105 6 m²
shed Shed (physics) A shed is a non-SI unit of area or cross-section used in nuclear physics. One shed is defined as being equal to 10−24 barn , an extraordinarily small unit of area....			= 10^-52 m²
square chain	sq ch	= 1 sq ch = .10 ac	= 404.685 642 24 m²
square foot Square foot The square foot is an imperial unit / U.S. customary unit of area, used mainly in the United States and United Kingdom. It is defined as the area of a Square with sides of 1 foot in length....	sq ft	= 1 ft × 1 ft
square inch Square inch A square inch is a Units of measurement of area, equal to the area of a Square with sides of one inch. The following symbols are used to denote square inches:...	sq in	= 1 in × 1 in
square kilometre Square kilometre Square kilometre , symbol km2, is a decimal multiple of the SI Units of measurement of surface area, the square metre, one of the SI derived units....	km²	= 1 km²	= 10⁶ m²
square link	sq lnk	= 1 lnk²
square metre Square metre The square metre is the SI derived unit of area, with symbol m?. It is defined as the area of a square whose sides measure exactly one metre.... (SI unit)	m²	= 1 m Metre The metre or meter is a Unit of measurement of length. It is the SI base unit of length in the metric system and in the International System of Units , used around the world for general and scientific purposes.... × 1 m	= 1 m²
square mil; square thou	sq mil	= 1 mil × 1 mil
square mile Mile A mile is a Units of measurement of length, usually used to measure distance, in a number of different systems. In contemporary English contexts, mile most commonly refers to the statute mile of 5,280 Feet or the nautical mile of 1,852 meters .... ; section	sq mi	= 1 mi × 1 mi
square rod/pole/perch	sq rd	= 1 sq rd	= 25.292 852 64 m²
square U.S. Survey foot Foot The foot is an anatomical structure found in many animals. It is the terminal portion of a limb which bears weight and allows locomotion. In many animals with feet, the foot is a separate organ at the terminal part of the leg made up of one or more segments or bones, generally including claws or nails....	sq ft	= 1 sq ft (US)
square U.S. Survey mile Mile A mile is a Units of measurement of length, usually used to measure distance, in a number of different systems. In contemporary English contexts, mile most commonly refers to the statute mile of 5,280 Feet or the nautical mile of 1,852 meters ....	sq mi	= 1 sq mi (US)
square yard Square yard The square yard is an Imperial unit/U.S. customary unit unit of area, formerly used in most of the English language-speaking world but now generally replaced by the square metre outside of the US....	sq yd	= 1 yd × 1 yd	= 0.836 127 36 m²
stremma Stremma The stremma is a Greece unit of land area, equal to 1,000 square metres, also called the 'royal' stremma. The name comes from a root meaning 'to turn', presumably referring to the amount of land that can be plowed/turned in a day....		= 1000 m²	= 1000 m²
township Survey township Survey township, sometimes called Congressional township, as used by the United States Public Land Survey System, refers to a square Conversion of units#Area of land, that is nominally six miles on a side....		= 36 sq mi (US)
yardland		= 30 ac

Volume

Volume
Volume

The **volume** of any solid, liquid, plasma, vacuum or theoretical object is how much three-dimensional space it occupies, often quantified numerically....
Name of unit	Symbol	Definition	Relation to SI Si Si, si, or SI may refer to :... units
acre foot Acre foot An acre-foot is a unit of volume commonly used in the United States in reference to large-scale water resources, such as reservoir , aqueducts, canals, sewer flow capacity, and river flows....	ac ft	= 1 ac x 1 ft = 43560 ft³	= 1 233.481 837 547 52 m³
cubic metre Cubic metre The cubic metre is the SI derived unit of volume. It is the volume of a cube with edges one metre in length. An alternative name, which allowed a different usage with SI prefix, was the st?re.... (SI unit)	m³	= 1 m × 1 m × 1 m	= 1 m³
litre Litre The litre or liter is a unit of volume. There are two official symbols: the Latin letter L in lower and upper case . The lower case L is often written as a cursive l to avoid confusion with the number 1 in antiqua fonts....	L	= 1 dm³	= 0.001 m³
lambda	?	= 1 mm³
drop Drop (unit) The drop is a unit of measure of volume, the amount dispensed as one drop from a Pasteur pipette. It is often used in giving quantities of liquid drugs to patients, and occasionally in cooking.... (metric)		= 1/20 mL
minim Minim (unit) The minim is a units of measurement of volume in both the Imperial unit and United States customary units systems of measurement. Specifically it is of a fluidram or of a fluid ounce.... (Imperial)	min	= 1/480 fl oz (Imp) = 1/60 fl dr (Imp)	3 m³
minim (U.S.)	min	= 1/480 US fl oz = 1/60 US fl dr
drop (U.S.) (alt)	gtt	= 1/456 US fl oz
drop (Imperial) (alt)	gtt	= 1/1824 gi (Imp)
drop (U.S.)	gtt	= 1/360 US fl oz	6 m³
drop (medical)		= 1/12 ml	3 m³
drop (Imperial)	gtt	= 1/288 fl oz (Imp)	8 m³
dash (U.S.)		= 1/96 US fl oz = ½ US pinch
dash (Imperial)		= 1/384 gi (Imp) = ½ pinch (Imp)	3 m³
pinch (U.S.)		= 1/48 US fl oz = ? US tsp
pinch (Imperial)		= 1/192 gi (Imp) = ? tsp (Imp)	6 m³
fluid scruple (Imperial)	fl s	= 1/24 fl oz (Imp)	6 m³
fluid drachm Dram (unit) The dram was historically both a coin and a weight. Currently it is both a small mass in the Apothecaries' system of weights and a small imperial unit of volume.... (Imperial)	fl dr	= ? fl oz (Imp)
fluid dram Dram (unit) The dram was historically both a coin and a weight. Currently it is both a small mass in the Apothecaries' system of weights and a small imperial unit of volume.... (U.S.); U.S. fluidram	fl dr	= ? US fl oz
teaspoon Teaspoon Kari is extraterrestial.A teaspoon, a type of cutlery , is a small spoon, commonly silver and part of a place setting, suitable for stirring and sipping the contents of a cup of tea or coffee.... (Canadian)	tsp	= 1/6 fl oz (Imp)	6 m³
teaspoon (U.S.)	tsp	= 1/6 US fl oz
teaspoon (metric)
teaspoon (Imperial)	tsp	= 1/24 gi (Imp)	3 m³
dessertspoon (Imperial)		= 1/12 gi (Imp)	6 m³
tablespoon Tablespoon A tablespoon is a type of large spoon usually used for serving. A tablespoonful, an amount equal to the capacity of one tablespoon, is commonly used as a unit of measurement of volume used in Cooking weights and measures .... (Canadian)	tbsp	= ½ fl oz (Imp)
tablespoon (U.S.)	tbsp	= ½ US fl oz
tablespoon (metric)
cubic inch Inch An inch is the name of a Units of measurement of length in a number of different systems, including Imperial units, and United States customary units....	cu in	= 1 in × 1 in × 1 in
tablespoon (Imperial)	tbsp	= 5/8 fl oz (Imp)
pony		= 3/4 US fl oz
fluid ounce Fluid ounce A fluid ounce is a unit of volume in both the Imperial unit and the United States customary units systems. It is common to refer to the unit simply as an ounce, especially in cases where no confusion with the unit of mass is likely to occur.... (Imperial)	fl oz (Imp)	= 1/160 gal (Imp)
fluid ounce (U.S.)	US fl oz	= 1/128 gal (US)
shot		= 1 US fl oz
jigger		= 1½ US fl oz
gill Gill A gill is an anatomical structure found in many aquatic ecosystem organisms. It is a respiration organ whose function is the extraction of oxygen from water and the excretion of carbon dioxide.... (U.S.)	gi (US)	= 4 US fl oz
gill (Imperial); Noggin	gi (Imp); nog	= 5 fl oz (Imp)
cup Cup (unit) The cup is a Units of measurement for volume, used in cooking to measure bulk foods, such as granulated sugar , and liquids . It is in common use in the United States and nations influenced by them, such as Japan.... (Canadian)	c (CA)	= 8 fl oz (Imp)
cup (U.S.)	c (US)	= 8 US fl oz = 1/16 gal (US)
cup (metric)	c
breakfast cup		= 10 fl oz (Imp)
pint Pint The pint is an English unit of volume or capacity in the imperial unit and United States customary units. The imperial version is 20 imperial fluid ounces and is equivalent to 568 mL, while the U.S.... (U.S. fluid)	pt (US fl)	= ? gal (US)
pint (U.S. dry)	pt (US dry)	= 1/64 bu (US lvl) = ? gal (US dry)
pint (Imperial)	pt (Imp)	= ? gal (Imp)
fifth		= 1/5 US gal
quart Quart The quart is an Imperial unit and United States customary units unit of measurement of volume equal to a quarter of a gallon. Since gallons of various sizes have historically been in use, quarts of various sizes have also existed.... (U.S. fluid)	qt (US)	= ¼ gal (US fl)
quart (U.S. dry)	qt (US)	= 1/32 bu (US lvl) = ¼ gal (US dry)
quart (Imperial)	qt (Imp)	= ¼ gal (Imp)
pottle; quartern		= ½ gal (Imp) = 80 fl oz (Imp)
board-foot	fbm	= 144 cu in
gallon Gallon A gallon is a measure of volume of approximately four litres. Historically it has had many different definitions, but there are three definitions in current use.... (U.S. fluid; Wine)	gal (US)	= 231 cu in
gallon (U.S. dry)	gal (US)	= ? bu (US lvl)
gallon (Imperial)	gal (Imp)	=
beer gallon	beer gal	= 282 cu in
peck Peck A peck is an Imperial unit and United States customary units unit of dry measure, equivalent in each of these systems to 8 dry quarts, or 16 dry pints.... (U.S. dry)	pk	= ¼ US lvl bu
peck Peck A peck is an Imperial unit and United States customary units unit of dry measure, equivalent in each of these systems to 8 dry quarts, or 16 dry pints.... (Imperial)	pk	= 2 gal (Imp)
bucket Bucket (unit) A bucket was an imperial unit of liquid volume, equivalent to four gallons or 18.18436 litres. It is thus equivalent in size to the dry unit Kenning .... (Imperial)	bkt	= 4 gal (Imp)	= 0.018 184 36 m³
timber foot		= 1 cu ft	= 0.028 316 846 592 m³
cubic foot Cubic foot The cubic foot is an Imperial unit and United States customary units unit of volume, used in the United States, Canada and the United Kingdom. It is defined as the volume of a cube with sides of one foot in length.\|-...	cu ft	= 1 ft × 1 ft × 1 ft	= 0.028 316 846 592 m³
firkin Firkin A Firkin is an old English unit of volume. The name is derived from the Middle Dutch word vierdekijn, which means fourth, i.e. a fourth of a full-size barrel....		= 9 gal (US)	= 0.034 068 706 056 m³
bushel Bushel A bushel is a unit of dry measure, usually subdivided into eight local gallons in the systems of Imperial units and U.S. customary units. It is used for volumes of dry measure commodity, not liquids, most often in agriculture.... (U.S. dry level)	bu (US lvl)	= 2150.42 cu in	= 0.035 239 070 166 88 m³
bushel (Imperial)	bu (Imp)	= 8 gal (Imp)	= 0.036 368 72 m³
bushel (U.S. dry heaped)	bu (US)	= 1 ¼ bu (US lvl)	= 0.044 048 837 708 6 m³
strike (U.S.)		= 2 bu (US lvl)	= 0.070 478 140 333 76 m³
strike (Imperial)		= 2 bu (Imp)	= 0.072 737 44 m³
kilderkin Kilderkin The kilderkin is an old English unit of volume equal to half a barrel or two firkins. It was used as standard size for brewery casks. The word kilderkin comes from Dutch for a small cask....		= 18 gal (Imp)	= 0.081 829 62 m³
sack Sack A sack is a bag, especially a large one for carrying or storing goods.Sack can also mean, as a verb:* To Termination of employment* To Quarterback sack behind the line of scrimmage in American and Canadian football... (U.S.)		= 3 bu (US lvl)	= 0.105 717 210 500 64 m³
sack (Imperial); bag		= 3 bu (Imp)	= 0.109 106 16 m³
barrel Barrel (unit) The barrel is the name of several units of measurement of volume, generally in the range of about 100-200 L .... (U.S. dry)	bl (US)	= 105 qt (US) = 105/32 bu (US lvl)	= 0.115 628 198 985 075 m³
barrel (U.S. fluid)	fl bl (US)	= 31½ gal (US)	= 0.119 240 471 196 m³
coomb Coomb Coomb may refer to:Coomb , a 13th-century England liquid measurement by volume.Coombs test, an aid to medical diagnosis.*Coomb Teak or , a medicinal tree....		= 4 bu (Imp)	= 0.145 474 88 m³
barrel (petroleum)	bl; bbl	= 42 gal (US)	= 0.158 987 294 928 m³
barrel (Imperial)	bl (Imp)	= 36 gal (Imp)	= 0.163 659 24 m³
hogshead Hogshead A hogshead is a large Barrel of liquid . More specifically, it refers to a specified volume, measured in Imperial units, primarily applied to alcoholic beverages such as wine, ale, or cider.... (U.S.)	hhd (US)	= 2 fl bl (US)	= 0.238 480 942 392 m³
seam Seam Seam may refer to:* Seam , an indie rock band from Chicago, Illinois* Can seamer, a machine used to seal a lid to a can body, such as in paint or food cans...		= 8 bu (US lvl)	= 0.281 912 561 335 04 m³
quarter; pail		= 8 bu (Imp)	= 0.290 949 76 m³
hogshead (Imperial)	hhd (Imp)	= 2 bl (Imp)	= 0.327 318 48 m³
cord-foot		= 16 cu ft	= 0.453 069 545 472 m³
butt Butt (unit) The butt or pipe is an old English unit of wine casks, holding two hogsheads . A hogshead varied in size but today is most commonly 63 US gallons , so a butt is now usually 126 US gallons .... , pipe		= 126 gal (wine)	= 0.476 961 884 784 m³
perch Perch *Perca* is the genus of fish referred to as perch or, sometimes, yellow perch, a group of freshwater fish belonging to the family Percidae....	per	= 16½ ft × 1½ ft × 1 ft	= 0.700 841 953 152 m³
cubic yard Yard A yard is a Units of measurement of length in several different systems, including English units, Imperial units, and United States customary units....	cu yd	= 27 cu ft	= 0.764 554 857 984 m³
tun Ton Units of massThere are several similar units of mass or volume called the ton:Others*The long ton is used for petroleum products such as aviation fuel....		= 252 gal (wine)	= 0.953 923 769 568 m³
displacement ton Ton Units of massThere are several similar units of mass or volume called the ton:Others*The long ton is used for petroleum products such as aviation fuel....		= 35 cu ft	= 0.991 089 630 72 m³
water ton		= 28 bu (Imp)	= 1.018 324 16 m³
freight ton		= 40 cu ft	= 1.132 673 863 68 m³
wey (U.S.)		= 40 bu (US lvl)	= 1.409 562 806 675 2 m³
load		= 50 cu ft	= 1.415 842 329 6 m³
register ton		= 100 cu ft	= 2.831 684 659 2 m³
last Last A last is the form used in shoemaking to shape a shoe in the rough form of a human foot. It is used by cordwainers or shoemakers in the manufacture or repair of shoes....		= 80 bu (Imp)	= 2.909 497 6 m³
cord (firewood Wood fuel Wood fuel is wood used as fuel. The combustion of wood is currently the largest use of energy derived from a solid fuel biomass. Wood fuel can be used for cooking and heating, and occasionally for fueling steam engines and steam turbines that electricity generation.... )		= 8 ft × 4 ft × 4 ft	= 3.624 556 363 776 m³
cubic fathom Fathom A fathom is a Units of measurement of length in the Imperial unit , used especially for measuring the depth of water.There are 2 yards in a fathom....	cu fm	= 1 fm × 1 fm × 1 fm	= 6.116 438 863 872 m³
acre-inch		= 1 ac × 1 in	= 102.790 153 128 96 m³
cubic mile Mile A mile is a Units of measurement of length, usually used to measure distance, in a number of different systems. In contemporary English contexts, mile most commonly refers to the statute mile of 5,280 Feet or the nautical mile of 1,852 meters ....	cu mi	= 1 mi × 1 mi × 1 mi	= 4 168 181 825.440 579 584 m³

Angle

Angle
Angle

In geometry and trigonometry, an **angle** is the figure formed by two Ray sharing a common endpoint, called the vertex of the angle . The magnitude of the angle is the "amount of rotation" that separates the two rays, and can be measured by considering the length of circular arc swept out when one ray is rotated about the vertex to coincide...
Name of unit	Symbol	Definition	Relation to SI Si Si, si, or SI may refer to :... units
radian Radian The radian is a unit of plane angle, equal to 180/pi Degree , or about 57.2958 degrees, or about 57?17'45?. It is the standard unit of angular measurement in all areas of mathematics beyond the elementary level.... (SI unit)	rad	= 180°/p	= 1 rad
centesimal second of arc	"	= 1 grad/10000	˜ 1.570 796 µrad
arcsecond	"	= 1°/3600	˜ 4.848 137 µrad
centesimal minute of arc Minute of arc A minute of arc, arcminute, or MOA is a unit of angle, equal to one sixtieth of one degree . Since one degree is defined as one three hundred sixtieth of a circle, 1 minute of arc is 1/21600 of the amount of arc in a closed circle....	'	= 1 grad/100	˜ 0.157 080 mrad
minute of arc Minute of arc A minute of arc, arcminute, or MOA is a unit of angle, equal to one sixtieth of one degree . Since one degree is defined as one three hundred sixtieth of a circle, 1 minute of arc is 1/21600 of the amount of arc in a closed circle....	'	= 1°/60	˜ 0.290 888 mrad
angular mil Angular mil An angular mil, also mil, is a Units of measurement of angle....	µ	= 2p/6400 rad	˜ 0.981 748 mrad
grad Grad (angle) The grad is a unit of plane angle, equivalent to of a full circle, dividing a right angle in 100. It is also known as gon, grade, or gradian .... ; gradian; gon Gon Gon has the following meanings:* GON is the IATA airport code for Groton-New London Airport* In German, Swedish, and other northern European languages, gon is a synonym for grad , a measurement of plane angle equivalent to 1/400 of a full circle....	grad	= 2p/400 rad = 0.9°	˜ 15.707 963 mrad
degree (of arc) Degree (angle) A degree , usually denoted by ? , is a measurement of plane angle, representing 1/360 of a Turn ; one degree is equivalent to p/180 radians....	°	= p/180 rad	˜ 17.453 293 mrad
sign		= 30°	˜ 0.523 599 rad
octant Octant An octant is one of eight divisions....		= 45°	˜ 0.785 398 rad
sextant		= 60°	˜ 1.047 198 rad
quadrant Quadrant Quadrant may refer to:* One of the four sections of the Cartesian coordinate system#Two-dimensional coordinate system* Quadrant , a measuring instrument capable of measuring angles up to 90°...		= 90°	˜ 1.570 796 rad

Solid angle

Solid angle
Solid angle

The **solid angle**, O, is the angle in three-dimensional space that an object subtends at a point. It is a measure of how big that object appears to an observer looking from that point....
Name of unit	Symbol	Definition	Relation to SI Si Si, si, or SI may refer to :... units
steradian Steradian The steradian is the SI unit of solid angle. It is used to describe two-dimensional angular spans in three-dimensional space, analogous to the way in which the radian describes angles in a Plane ....	sr		(SI derived unit SI derived unit SI derived units are part of the SI system of measurement Units of measurements and are derived from the seven SI base units.Note that while the names of all SI units are in lowercase, the symbols of units named after people are written with an initial capital letter .... )

Mass

Note: see Weight
Weight

In the physical sciences, weight is a measurement of the gravitational force acting on an object. Near the surface of the Earth, the Earth's gravity is approximately constant; this means that an object's weight is roughly proportional to its mass....
for detail of mass/weight distinction and conversion

Mass
Mass

In physical science, **mass** refers to the degree of acceleration a body acquires when subject to a force: bodies with greater mass are accelerated less by the same force....
Name of unit	Symbol	Definition	Relation to SI Si Si, si, or SI may refer to :... units
kilogram Kilogram The kilogram or kilogrammeThe spelling kilogram is used by the International Committee for Weights and Measures and the U.S.... , grave Grave (mass) A grave is a metallic reference standard of one thousand grams that was used for a few years until it was replaced by the kilogram standard in 1799....	kg; G		(SI base unit SI base unit The International System of Units defines seven dimensional analysis SI base units. All other physical units can be derived from these base units: these are known as SI derived units.... )
electron Electron The electron is a subatomic particle that carries a negative electric charge. It has elementary particle and is believed to be a point particle.... rest mass, atomic unit of mass Atomic units Atomic units form a system of units convenient for atomic physics, electromagnetism, and quantum electrodynamics, especially when the focus is on the properties of electrons....	m_e
electronvolt Electronvolt In physics, the electron volt is a unit of energy. By definition, it is equal to the amount of kinetic energy gained by a single unbound electron when it accelerates through an Electrostatics potential difference of one volt....	eV	= 1 eV (energy unit) / c²	= 1.782 6×10^-36 kg
unified atomic mass unit	u; AMU
dalton	Da
gamma	?		= 1 µg
point		= 1/100 ct	= 2 mg
mite		= 1/20 gr	= 3.239 945 5 mg
mite (metric)		= 1/20 g	= 50 mg
grain Grain (measure) In many cultures, a grain is a Physical unit of measurement of mass that is based upon the mass of a single seed of a typical cereal. Historically, in Europe, the average masses of wheat and barley grain were used to define units of mass....	gr		= 64.798 91 mg
crith			˜ 89.9349 mg
carat Carat (mass) The carat is a unit of mass used for measuring gemstones and pearls . Currently a carat is defined as exactly 200 milligram . This definition, known as the metric carat, was adopted in 1907 at the Fourth General Conference on Weights and Measures, and soon afterwards in many countries around the world.... (metric)	ct		= 200 mg
carat Carat (mass) The carat is a unit of mass used for measuring gemstones and pearls . Currently a carat is defined as exactly 200 milligram . This definition, known as the metric carat, was adopted in 1907 at the Fourth General Conference on Weights and Measures, and soon afterwards in many countries around the world....	kt	= 3 1/6 gr	˜ 205.196 548 333 mg
sheet		= 1/700 lb av	= 647.9891 mg
scruple (apothecary Apothecary Apothecary is a historical name for a medicine who formulates and dispenses materia medica to physicians, surgery and patients ? a role now served by a pharmacist .... )	s ap	= 20 gr	= 1.295 978 2 g
pennyweight Pennyweight A pennyweight is a unit of mass which is the same as 24 Grain , 1/240th of a troy pound, 1/20th of a troy ounce, approximately 0.055 ounces or approximately 1.555 grams....	dwt; pwt	= 1/20 oz t	= 1.555 173 84 g
dram Avoirdupois The avoirdupois system is a system of Units of measurement based on a pound of sixteen ounces. It is the everyday system of weight used in the United States.... (avoirdupois)	dr av	= 27 11/32 gr	= 1.771 845 195 312 5 g
dram Dram (unit) The dram was historically both a coin and a weight. Currently it is both a small mass in the Apothecaries' system of weights and a small imperial unit of volume.... (apothecary; troy Troy weight Troy weight is a system of Physical units of mass customarily used for precious metals, black powder, and gemstones.Named after Troyes, France, the troy system of weights was known to exist in medieval times, at the celebrated fair at Troyes in North Eastern France.... )	dr t	= 60 gr	= 3.887 934 6 g
hyl (CGS unit)		= 1 gee × 1 g × 1 s²/m	= 9.806 65 g
ounce Ounce This article is about the unit of mass. For the unit of force, see Pound-force. For the unit of volume, see Fluid ounce. For all other uses, see Ounce .... (avoirdupois)	oz av	= 1/16 lb	= 28.349 523 125 g
assay ton (short)	AT	= 1 mg × 1 sh tn ÷ 1 oz t	˜ 29.166 667 g
ounce (apothecary; troy)	oz t	= 1/12 lb t	= 31.103 476 8 g
assay ton (long)	AT	= 1 mg × 1 long tn ÷ 1 oz t	˜ 32.666 667 g
mark		= 8 oz t	= 248.827 814 4 g
pound (troy) Pound (mass) The pound or pound-mass is a Units of measurement of massused in the Imperial unit, United States customary units and other systems of measurement....	lb t	= 5760 grains	= 0.373 241 721 6 kg
pound (avoirdupois) Pound (mass) The pound or pound-mass is a Units of measurement of massused in the Imperial unit, United States customary units and other systems of measurement....	lb av	= 7000 grains	= 0.453 592 37 kg
pound (metric) Pound (mass) The pound or pound-mass is a Units of measurement of massused in the Imperial unit, United States customary units and other systems of measurement....			= 500 g
clove		= 8 lb av	= 3.628 738 96 kg
stone Stone (weight) The stone is a unit of mass. It is part of the Imperial unit used in the UK, and formerly used in most Commonwealth of Nations countries. It is equal to 14 pounds , which is equivalent to approximately 62.3 Newtons on Earth, or about 6.35 kilograms ....	st	= 14 lb av	= 6.350 293 18 kg
hyl (MKS unit)		= 1 gee × 1 kg × 1 s²/m	= 9.806 65 kg
quarter (Imperial)		= 1/4 long cwt = 2 st = 28 lb av	= 12.700 586 36 kg
slug; geepound	slug	= 1 gee × 1 lb av × 1 s²/ft	˜ 14.593 903 kg
bag (Portland cement Portland cement Portland cement is the most common type of cement in general use around the world, because it is a basic ingredient of concrete, mortar , stucco and most non-specialty grout.... )		= 94 lb av	= 42.637 682 78 kg
short hundredweight Hundredweight Centum weight or Hundred weight / hundredweight is a unit of measurement for mass in U.S. customary units and was historically used in the Imperial system in the United Kingdom and the Commonwealth of Nations.... ; cental	sh cwt	= 100 lb av	= 45.359 237 kg
long hundredweight Hundredweight Centum weight or Hundred weight / hundredweight is a unit of measurement for mass in U.S. customary units and was historically used in the Imperial system in the United Kingdom and the Commonwealth of Nations....	long cwt or cwt	= 112 lb av	= 50.802 345 44 kg
bag (coffee Coffee Coffee is a brewed drink prepared from roasted seeds, commonly called coffee beans, of the Coffea. Caffeinated coffee has a stimulating effect in humans.... )		= 60 kg	= 60 kg
quintal Quintal (unit of mass) The quintal or centner is a historical unit of mass with many different definitions in different countries, but usually it is 100 base units of mass, e.g.... (metric)	q		= 100 kg
wey		= 252 lb = 18 st	= 114.305 277 24 kg (variants exist)
long quarter (informal)		= ¼ long tn	= 254.011 727 2 kg
quarter (informal)		= ¼ short tn	= 226.796 185 kg
kip Kip (unit) In the United States, a kip is a unit of force that equals 1,000 pound-force, used primarily by architects and engineers to measure engineering loads....	kip	= 1000 lb av	= 453.592 37 kg
short ton Short ton The short ton is a unit of weight equal to 2,000 Pound . In the United States it is often called simply ton without distinguishing it from the metric ton or the long ton ; rather, the other two are specifically noted....	sh tn	= 2000 lb	= 907.184 74 kg
tonne Tonne A tonne or metric ton , also referred to as a *metric tonne, is a measurement of mass equal to 1,000 kilograms, or 2204.6226 pounds.... (mts Metre-tonne-second system of units The metre-tonne-second* or mts system of units is a system of physical units. It was invented in France, hence the unit names sth?ne and pi?ze, and was adopted only by the Soviet Union in 1933, and abolished there in 1955.... unit)	t		= 1000 kg
long ton Long ton Long ton is the name for the unit called the "ton" in the avoirdupois or Imperial unit system of measurements, as formerly used in the United Kingdom and several other Commonwealth of Nations countries....	long tn or ton	= 2240 lb	= 1016.046 908 8 kg
barge		= 22 ½ sh tn	= 20,411.656 65 kg
Zentner	Ztr.		Definitions vary; see and . See also discussion at Talk:Conversion of units#Zentner

In physics

Physics

Physics is the natural science which examines basic concepts such as energy, force, and spacetime and all that derives from these, such as mass, charge, matter and its Motion ....
, the pound of mass

Pound (mass)

The pound or pound-mass is a Units of measurement of massused in the Imperial unit, United States customary units and other systems of measurement....
is sometimes written lbm to distinguish it from the pound-force

Pound-force

The pound-force or simply pound is a Units of measurement of force....
(lbf). It should not be read as the mongrel unit "pound metre".

Time

Time
Time

**Time** is a component of the measurement used to sequence events, to compare the durations of events and the intervals between them, and to quantify the motions of objects....
, t
Name of unit	Symbol	Definition	Relation to SI Si Si, si, or SI may refer to :... units
second Second The second , sometimes abbreviated sec., is the name of a units of measurement of time, and is the International System of Units SI base unit of time....	s	time of 9192631770 periods of the radiation corresponding to the transition between the 2 hyperfine levels of the ground state of the caesium 133 atom at 0 K (but other seconds are sometimes used in astronomy)	(SI base unit SI base unit The International System of Units defines seven dimensional analysis SI base units. All other physical units can be derived from these base units: these are known as SI derived units.... )
Planck time Planck time In physics, the Planck time , is the unit of time in the system of natural units known as Planck units. It is the time required for light to travel, in a vacuum, a distance of 1 Planck length....		= (G Gravitational constant The gravitational constant, denoted G, is an empirical physical constant involved in the calculation of the gravitation between objects with mass.... /c Speed of light The speed of light in an free space is an important physical constant usually written as c, with a value of 299,792,458 metres per second.... ⁵)^½
atomic unit of time Atomic units Atomic units form a system of units convenient for atomic physics, electromagnetism, and quantum electrodynamics, especially when the focus is on the properties of electrons....	au	= a₀ Bohr radius In the Bohr model of the structure of an atom, put forward by Niels Bohr in 1913, electrons orbit a central atomic nucleus. The model says that the electrons orbit only at certain distances from the nucleus, depending on their energy.... /(a·c)
svedberg Svedberg A svedberg is a non-SI physics unit used for sedimentation coefficients. It characterizes the behaviour of a particle type in sedimentation processes, notably centrifugation....	S	= 10^-13 s	= 100 fs
shake Shake (time) A shake is an informal Units of measurement of time equal to 10 nanoseconds, or 10-8 seconds. It has applications in nuclear physics, helping to conveniently express the timing of various events in a nuclear explosion....		= 10^-8 s	= 10 ns
sigma		= 10^-6 s	= 1 µs
jiffy Jiffy (time) The term jiffy is used in different applications for various short periods of time; in informal speech it means any unspecified short period of time, but it also has more precise definitions....		= 1/60 s	˜ .016667 s
jiffy (alternate)		= 1/100 s	= 10 ms
helek Helek The helek is a unit of time used in the calculation of the Hebrew calendar. The hour is divided into 1080 halakim. A helek is 31/3 seconds or 1/18 minute....		= 1/1080 h	˜ 3.333333 s
minute Minute A minute is a unit of measurement of time or of angle.The minute is a Unit of measurement of time equal to 1/60th of an hour or 60 seconds. In the Coordinated Universal Time time scale, a minute occasionally has 59 or 61 seconds; see leap second....	min		= 60 s
milliday Metric time Metric time is the measure of time interval using the metric system, which defines the second as the base unit of time, and multiple and submultiple units formed with SI prefix, such as kiloseconds and milliseconds....	md	= 86 400 s / 1000	= 86.4 s
moment		= 90 s	= 90 s
ke Ke (unit) The ke is a traditional Chinese unit of decimal time lasting approximately a quarter of a western hour. Traditionally the ke divides a day into 100 equal intervals of 14.4 minutes .... (traditional)		= 1/100 d	= 864 s
quarter (of an hour)	ke Ke (unit) The ke is a traditional Chinese unit of decimal time lasting approximately a quarter of a western hour. Traditionally the ke divides a day into 100 equal intervals of 14.4 minutes ....	= 1/96 d	= 900 s
hour Hour The hour is a unit of time. It is not an SI unit but is Non-SI units accepted for use with SI....	h	= 60 min	= 3600 s
day Day A day is a units of measurement of time equivalent to approximately 24 hours. It is not an International System of Units unit but it is accepted for use with SI....	d	= 24 h	= 86 400 s
day Day A day is a units of measurement of time equivalent to approximately 24 hours. It is not an International System of Units unit but it is accepted for use with SI....	d	= average time between consecutive midnights	˜ 86400 s
week Week A week is a grouping of days or a division of a larger grouping such as a lunar month, year, etc. The week allows for shorter routine than a month and benefits groups of people with organising market days, worship, taxes, etc....	wk	= 7 d	= 604 800 s
fortnight Fortnight The fortnight is a unit of time equivalent to fourteen days. The word derives from the Old English language feorwertyne niht, meaning "fourteen nights"....		= 2 wk	= 1 209 600 s
month Month The month is a unit of time, used with calendars, which is approximately as long as some natural Orbital period related to the motion of the Moon; month and Moon are cognates.... (hollow)	mo	= 29 d	= 2 505 600 s
month Month The month is a unit of time, used with calendars, which is approximately as long as some natural Orbital period related to the motion of the Moon; month and Moon are cognates....	mo	= 30 d	= 2 592 000 s
month Month The month is a unit of time, used with calendars, which is approximately as long as some natural Orbital period related to the motion of the Moon; month and Moon are cognates.... (full)	mo	= 31 d	= 2 678 400 s
year Year A year is the time between two recurrences of an event related to the orbit of the Earth around the Sun. By extension, this can be applied to any planet: for example, a "Martian year" is the time in which Mars completes its own orbit.... (Calendar)	a, y, or yr	= 365 d	= 31 536 000 s
year Year A year is the time between two recurrences of an event related to the orbit of the Earth around the Sun. By extension, this can be applied to any planet: for example, a "Martian year" is the time in which Mars completes its own orbit.... (Gregorian)	a, y, or yr	= 365.2425 d	= 31 556 952 s
year Year A year is the time between two recurrences of an event related to the orbit of the Earth around the Sun. By extension, this can be applied to any planet: for example, a "Martian year" is the time in which Mars completes its own orbit.... (Julian)	a, y, or yr	= 365.25 d	= 31 557 600 s
sidereal year Sidereal year The sidereal year is a misnomer for solar orbit. It is the time taken for the Sun to return to the same position with respect to the stars of the celestial sphere....	a, y, or yr	= time taken for Sun to return to the same position with respect to the stars of the celestial sphere ˜ 365.256363 d	˜ 31 558 149.7632 s
Olympiad Olympiad An Olympiad is a period of four years, associated with the Ancient Olympic Games of Classical Greece. In the Hellenistic period, beginning with Ephorus, Olympiads were used as Epoch ....		= 4 a of 365 d
lustre; lustrum		= 5 a of 365 d
octaeteris Octaeteris In astronomy, an octaeteris is the period of eight solar years after which the moon phase occurs on the same day of the year plus one or two days....		= 8 a of 365 d
decade Decade A decade is a period of ten years. The word is derived from the late Latin language decas, from Greek language decas, from deca. The other words for spans of years also come from Latin: lustrum , century , millennium ....		= 10 a of 365 d
enneadecaeteris; Metonic cycle Metonic cycle The Metonic cycle or Enneadecaeteris in astronomy and calendar studies is a particular approximate Least common multiple of the tropical year and the Month#Synodic month....		= 110 mo (hollow) + 125 mo (full) = 19 a of 365 d
Callippic cycle Callippic cycle In astronomy and calendar studies, the Callippic cycle is a particular approximate Least common multiple of the year and the Month#Synodic month, that was proposed by Callippus in 330 BC....		= 441 mo (hollow) + 499 mo (full) = 76 a of 365.25 d
century Century A century is one hundred consecutive years.Centuries are numbered names of numbers in English#Ordinal_numbers in English and many other languages .... (Calendar)		= 100 a of 365 d
century Century A century is one hundred consecutive years.Centuries are numbered names of numbers in English#Ordinal_numbers in English and many other languages .... (Julian)		= 100 a of 365.25 d
Hipparchic cycle Hipparchic cycle The Greek astronomer Hipparchus introduced two cycles that have been named after him in later literature.The first is described in Ptolemy's Almagest IV.2....		= 4 Callippic cycles - 1 d
millennium Millennium A millennium is a period of time equal to one thousand years . The term may implicitly refer to calendar millenniums; periods tied numerically to a particular calendar, specifically ones that begin at the starting point of the calendar in question or in later years which are whole number multiples of a thousand years after it.... (Calendar)		= 1000 a of 365 d = 365,000 d
millennium Millennium A millennium is a period of time equal to one thousand years . The term may implicitly refer to calendar millenniums; periods tied numerically to a particular calendar, specifically ones that begin at the starting point of the calendar in question or in later years which are whole number multiples of a thousand years after it.... (Gregorian)		= 1000 a of 365.2425 d = 356,242.5 d
millennium Millennium A millennium is a period of time equal to one thousand years . The term may implicitly refer to calendar millenniums; periods tied numerically to a particular calendar, specifically ones that begin at the starting point of the calendar in question or in later years which are whole number multiples of a thousand years after it.... (Julian)		= 1000 a of 365.25 d = 365,250 d
Sothic cycle Sothic cycle The Sothic cycle or Canicular period is a period of 1461 ancient Egyptian years or 1460 Julian calendar years . During a Sothic cycle, the 365-day year loses enough time that the start of the year once again coincides with the heliacal rising of the star Sirius ....		= 1461 a of 365 d
generation

Speed or velocity

Speed
Speed

**Speed** is the rate of Motion , or equivalently the rate of change of distance.Speed is a Scalar quantity with dimensions length/time; the equivalent Vector quantity to speed is velocity....
Name of unit	Symbol	Definition	Relation to SI Si Si, si, or SI may refer to :... units
metre per second Metre per second Metre per second is an SI derived unit of both speed and velocity , defined by distance in metres divided by time in seconds.This is the main unit of speed.... (SI unit)	m/s		= 1 m/s
foot per hour Hour The hour is a unit of time. It is not an SI unit but is Non-SI units accepted for use with SI....	fph	= 1 ft/h
furlong Furlong A furlong is a measure of distance in imperial units and U.S. customary units. It is equal to one-eighth of a mile, 220 yards, 660 foot or 201.168 meters.... per fortnight Fortnight The fortnight is a unit of time equivalent to fourteen days. The word derives from the Old English language feorwertyne niht, meaning "fourteen nights"....		= furlong/fortnight
inch Inch An inch is the name of a Units of measurement of length in a number of different systems, including Imperial units, and United States customary units.... per minute Minute A minute is a unit of measurement of time or of angle.The minute is a Unit of measurement of time equal to 1/60th of an hour or 60 seconds. In the Coordinated Universal Time time scale, a minute occasionally has 59 or 61 seconds; see leap second....	ipm	= 1 in/min
foot per minute Minute A minute is a unit of measurement of time or of angle.The minute is a Unit of measurement of time equal to 1/60th of an hour or 60 seconds. In the Coordinated Universal Time time scale, a minute occasionally has 59 or 61 seconds; see leap second....	fpm	= 1 ft/min
inch Inch An inch is the name of a Units of measurement of length in a number of different systems, including Imperial units, and United States customary units.... per second Second The second , sometimes abbreviated sec., is the name of a units of measurement of time, and is the International System of Units SI base unit of time....	ips	= 1 in/s
kilometre per hour	km/h	= 1 km/h
foot per second Second The second , sometimes abbreviated sec., is the name of a units of measurement of time, and is the International System of Units SI base unit of time....	fps	= 1 ft/s
mile per hour	mph	= 1 mi/h	= 0.447 04 m/s
knot Knot (speed) The knot is a unit of speed equal to one nautical mile per hour. Its kn abbreviation is preferred by American and Canadian maritime authorities, and by the Institute of Electrical and Electronics Engineers; however, the kt and kts abbreviations also are used....	kn	= 1 NM Nautical mile A nautical mile or sea mile is a unit of length. It corresponds approximately to one minute of arc of latitude along any meridian .It is a non-International System of Units unit used especially by navigators in the shipping and aviation industries.... /h = 1.852 km/h	˜ 0.514 444 m/s
knot Knot (speed) The knot is a unit of speed equal to one nautical mile per hour. Its kn abbreviation is preferred by American and Canadian maritime authorities, and by the Institute of Electrical and Electronics Engineers; however, the kt and kts abbreviations also are used.... (Admiralty)	kn		˜ 0.514 773 m/s
mile Mile A mile is a Units of measurement of length, usually used to measure distance, in a number of different systems. In contemporary English contexts, mile most commonly refers to the statute mile of 5,280 Feet or the nautical mile of 1,852 meters .... per minute Minute A minute is a unit of measurement of time or of angle.The minute is a Unit of measurement of time equal to 1/60th of an hour or 60 seconds. In the Coordinated Universal Time time scale, a minute occasionally has 59 or 61 seconds; see leap second....	mpm	= 1 mi/min	= 26.8224 m/s
mile Mile A mile is a Units of measurement of length, usually used to measure distance, in a number of different systems. In contemporary English contexts, mile most commonly refers to the statute mile of 5,280 Feet or the nautical mile of 1,852 meters .... per second Second The second , sometimes abbreviated sec., is the name of a units of measurement of time, and is the International System of Units SI base unit of time....	mps	= 1 mi/s = 1.609 344 km/s	= 1609.344 m/s
speed of light Speed of light The speed of light in an free space is an important physical constant usually written as c, with a value of 299,792,458 metres per second.... in vacuum	c	= 299 792 458 m/s	= 299 792 458 m/s
speed of sound Speed of sound Sound is a vibration that travels through an elasticity medium as a wave. The speed of sound describes how much distance such a wave travels in a certain amount of time.... in air	s		˜ 344 m/s at 20 °C, 60% relative humidity
mach Mach Mach may refer to:* Mach number, a measure of speed* Gillette Mach3, a manual razor with three blades* Mach bands, an optical illusion* Muscarinic acetylcholine receptor, abbreviated mACh...	M		˜ 331 m/s

A velocity

Velocity

In physics, velocity is defined as the Derivative of Position vector. It is a vector physical quantity; both speed and direction are required to define it....
consists of a speed combined with a direction; the speed part of the velocity takes units of speed.

Acceleration

Acceleration
Acceleration

File:Acceleration.JPGFile:Acceleration components.JPGIn physics, and more specifically kinematics, **acceleration** is the change in velocity over time....
Name of unit	Symbol	Definition	Relation to SI Si Si, si, or SI may refer to :... units
metre per second squared Metre per second squared The metre per second squared is the SI derived unit of acceleration. It is a measure of magnitude and can be a scalar measure or, when associated with a direction, a vector .... (SI unit)	m/s²	= 1 m/s²	= 1 m/s²
foot per hour Hour The hour is a unit of time. It is not an SI unit but is Non-SI units accepted for use with SI.... per second Second The second , sometimes abbreviated sec., is the name of a units of measurement of time, and is the International System of Units SI base unit of time....	fph/s	= 1 ft/(h·s)
inch Inch An inch is the name of a Units of measurement of length in a number of different systems, including Imperial units, and United States customary units.... per minute Minute A minute is a unit of measurement of time or of angle.The minute is a Unit of measurement of time equal to 1/60th of an hour or 60 seconds. In the Coordinated Universal Time time scale, a minute occasionally has 59 or 61 seconds; see leap second.... per second Second The second , sometimes abbreviated sec., is the name of a units of measurement of time, and is the International System of Units SI base unit of time....	ipm/s	= 1 in/(min·s)
foot per minute Minute A minute is a unit of measurement of time or of angle.The minute is a Unit of measurement of time equal to 1/60th of an hour or 60 seconds. In the Coordinated Universal Time time scale, a minute occasionally has 59 or 61 seconds; see leap second.... per second Second The second , sometimes abbreviated sec., is the name of a units of measurement of time, and is the International System of Units SI base unit of time....	fpm/s	= 1 ft/(min·s)
galileo	Gal	= 1 cm/s²	= 10^-2 m/s²
inch Inch An inch is the name of a Units of measurement of length in a number of different systems, including Imperial units, and United States customary units.... per second Second The second , sometimes abbreviated sec., is the name of a units of measurement of time, and is the International System of Units SI base unit of time.... squared	ips²	= 1 in/s²
foot per second Second The second , sometimes abbreviated sec., is the name of a units of measurement of time, and is the International System of Units SI base unit of time.... squared	fps²	= 1 ft/s²
mile Mile A mile is a Units of measurement of length, usually used to measure distance, in a number of different systems. In contemporary English contexts, mile most commonly refers to the statute mile of 5,280 Feet or the nautical mile of 1,852 meters .... per hour Hour The hour is a unit of time. It is not an SI unit but is Non-SI units accepted for use with SI.... per second Second The second , sometimes abbreviated sec., is the name of a units of measurement of time, and is the International System of Units SI base unit of time....	mph/s	= 1 mi/(h·s)
knot Knot (speed) The knot is a unit of speed equal to one nautical mile per hour. Its kn abbreviation is preferred by American and Canadian maritime authorities, and by the Institute of Electrical and Electronics Engineers; however, the kt and kts abbreviations also are used.... per second Second The second , sometimes abbreviated sec., is the name of a units of measurement of time, and is the International System of Units SI base unit of time....	kn/s	= 1 kn/s
standard gravity	g		= 9.806 65 m/s²
mile Mile A mile is a Units of measurement of length, usually used to measure distance, in a number of different systems. In contemporary English contexts, mile most commonly refers to the statute mile of 5,280 Feet or the nautical mile of 1,852 meters .... per minute Minute A minute is a unit of measurement of time or of angle.The minute is a Unit of measurement of time equal to 1/60th of an hour or 60 seconds. In the Coordinated Universal Time time scale, a minute occasionally has 59 or 61 seconds; see leap second.... per second Second The second , sometimes abbreviated sec., is the name of a units of measurement of time, and is the International System of Units SI base unit of time....	mpm/s	= 1 mi/(min·s)	= 26.8224 m/s²
mile Mile A mile is a Units of measurement of length, usually used to measure distance, in a number of different systems. In contemporary English contexts, mile most commonly refers to the statute mile of 5,280 Feet or the nautical mile of 1,852 meters .... per second Second The second , sometimes abbreviated sec., is the name of a units of measurement of time, and is the International System of Units SI base unit of time.... squared	mps²	= 1 mi/s²

Force

Force
Name of unit	Symbol	Definition	Relation to SI Si Si, si, or SI may refer to :... units
atomic unit of force Atomic units Atomic units form a system of units convenient for atomic physics, electromagnetism, and quantum electrodynamics, especially when the focus is on the properties of electrons....		= m_e·a²·c Speed of light The speed of light in an free space is an important physical constant usually written as c, with a value of 299,792,458 metres per second.... ²/a₀ Bohr radius In the Bohr model of the structure of an atom, put forward by Niels Bohr in 1913, electrons orbit a central atomic nucleus. The model says that the electrons orbit only at certain distances from the nucleus, depending on their energy....
dyne Dyne In physics, the dyne is a Units of measurement of Force specified in the Centimetre gram second system of units system of units, a predecessor of the modern International System of Units.... (cgs unit)	dyn	= g·cm/s²	= 10^-5 N
milligrave Grave (mass) A grave is a metallic reference standard of one thousand grams that was used for a few years until it was replaced by the kilogram standard in 1799.... -force, gravet-force	mGf; gf	= g Standard gravity Standard gravity, usually denoted by g0 or gn, is the nominal acceleration due to Earth's gravity at the Earth's surface at sea level.... × 1 g	= 9.806 65 mN
pound Pound Pound may refer to:...	lb	= slug·ft/s²	= 4.448230531 N
kilogram-force Kilogram-force The unit kilogram-force or kilopond is defined as the magnitude of the force exerted on one kilogram of mass by a gravitational field .... ; kilopond; grave Grave (mass) A grave is a metallic reference standard of one thousand grams that was used for a few years until it was replaced by the kilogram standard in 1799.... -force	kgf; kp; Gf	= g × 1 kg	= 9.806 65 N
kip Kip (unit) In the United States, a kip is a unit of force that equals 1,000 pound-force, used primarily by architects and engineers to measure engineering loads.... ; kip-force	kip; kipf; klbf	= g × 1000 lb
newton Newton The newton is the International System of Units SI derived unit of force, named after Isaac Newton in recognition of his work on classical mechanics.... (SI unit)	N	= kg·m/s²	= 1 N
ounce-force	ozf	= g × 1 oz	= 0.278 013 850 953 781 2 N
pound-force Pound-force The pound-force or simply pound is a Units of measurement of force....	lbf	= g × 1 lb	= 4.448 221 615 260 5 N
poundal Poundal The poundal is a non-SI Units of measurement of force. It is a part of the foot-pound-second system of units, a coherent subsystem of English units introduced in 1879, and one of several specialized subsystems of mechanical units used as aids in calculations....	pdl	= 1 lb·ft/s²	= 0.138 254 954 376 N
sthene (mts Metre-tonne-second system of units The metre-tonne-second or mts system of units is a system of physical units. It was invented in France, hence the unit names sth?ne and pi?ze, and was adopted only by the Soviet Union in 1933, and abolished there in 1955.... unit)	sn	= 1 t·m/s²
ton Ton Units of massThere are several similar units of mass or volume called the ton:Others*The long ton is used for petroleum products such as aviation fuel.... -force	tnf	= g × 1 sh tn

Weight

In the physical sciences, weight is a measurement of the gravitational force acting on an object. Near the surface of the Earth, the Earth's gravity is approximately constant; this means that an object's weight is roughly proportional to its mass....

Pressure or mechanical stress

Pressure
Pressure

**Pressure** is the force per unit area applied to an object in a direction surface normal to the surface. **Gauge pressure** is the pressure relative to the local atmospheric or ambient pressure....
Name of unit	Symbol	Definition	Relation to SI Si Si, si, or SI may refer to :... units
atmosphere Atmospheric pressure Atmospheric pressure is sometimes defined as the force per unit area exerted against a surface by the weight of air above that surface at any given point in the Earth's atmosphere.... (standard)	atm		= 101 325 Pa
atmosphere Atmospheric pressure Atmospheric pressure is sometimes defined as the force per unit area exerted against a surface by the weight of air above that surface at any given point in the Earth's atmosphere.... (technical)	at	= 1 kgf/cm²
bar Bar (unit) The bar , decibar and the millibar are units of pressure. They are not SI units, nor are they cgs units, but they are accepted for use with the SI....	bar		= 10⁵ Pa
barye (cgs unit)		= 1 dyn/cm²	= 0.1 Pa
centimetre of mercury	cmHg	= 13 595.1 kg/m³ × 1 cm × g
centimetre of water Water Water is a common chemical substance that is essential for the survival of all known forms of life. In typical usage, water refers only to its liquid form or States of matter, but the substance also has a solid state, ice, and a gaseous state, water vapor or steam.... (4 °C)	cmH₂O	˜ 999.972 kg/m³ × 1 cm × g	˜ 98.0638 Pa
foot of mercury (conventional)	ftHg	= 13 595.1 kg/m³ × 1 ft × g
foot of water Water Water is a common chemical substance that is essential for the survival of all known forms of life. In typical usage, water refers only to its liquid form or States of matter, but the substance also has a solid state, ice, and a gaseous state, water vapor or steam.... (39.2 °F)	ftH₂O	˜ 999.972 kg/m³ × 1 ft × g
inch Inch An inch is the name of a Units of measurement of length in a number of different systems, including Imperial units, and United States customary units.... of mercury (conventional)	inHg	= 13 595.1 kg/m³ × 1 in × g
inch Inch An inch is the name of a Units of measurement of length in a number of different systems, including Imperial units, and United States customary units.... of water Water Water is a common chemical substance that is essential for the survival of all known forms of life. In typical usage, water refers only to its liquid form or States of matter, but the substance also has a solid state, ice, and a gaseous state, water vapor or steam.... (39.2 °F)	inH₂O	˜ 999.972 kg/m³ × 1 in × g	˜ 249.082 Pa
kilogram-force per square millimetre	kgf/mm²	= 1 kgf/mm²
kip Kip (unit) In the United States, a kip is a unit of force that equals 1,000 pound-force, used primarily by architects and engineers to measure engineering loads.... per square inch Inch An inch is the name of a Units of measurement of length in a number of different systems, including Imperial units, and United States customary units....	ksi	= 1 kipf/sq in
micron (micrometre) of mercury	mHg	= 13 595.1 kg/m³ × 1 m × g ˜ 0.001 torr	˜ 0. 133 322 4 Pa
millimetre of mercury Torr The torr is a non-International System of Units unit of pressure defined as 1/760 of an Atmosphere . It was named after Evangelista Torricelli, an Italian physicist and mathematician who discovered the principle of the barometer in 1644....	mmHg	= 13 595.1 kg/m³ × 1 mm × g ˜ 1 torr	˜ 133.322 4 Pa
millimetre of water Water Water is a common chemical substance that is essential for the survival of all known forms of life. In typical usage, water refers only to its liquid form or States of matter, but the substance also has a solid state, ice, and a gaseous state, water vapor or steam.... (3.98 °C)	mmH₂O	˜ 999.972 kg/m³ × 1 mm × g = 0.999972 kgf/m²	= 9.806 38 Pa
pascal Pascal (unit) The pascal is the SI derived unit of pressure, stress , Young's modulus and tensile strength. It is a measure of force per unit area i.e. equivalent to one newton per square meter or one joule per cubic meter.... (SI unit)	Pa	= N/m² = kg/(m·s²)	= 1 Pa
pièze (mts Metre-tonne-second system of units The metre-tonne-second or mts system of units is a system of physical units. It was invented in France, hence the unit names sth?ne and pi?ze, and was adopted only by the Soviet Union in 1933, and abolished there in 1955.... unit)	pz	= 1000 kg/m·s²
pound per square foot	psf	= 1 lbf/ft²	˜ 47.880 25 Pa
poundal Poundal The poundal is a non-SI Units of measurement of force. It is a part of the foot-pound-second system of units, a coherent subsystem of English units introduced in 1879, and one of several specialized subsystems of mechanical units used as aids in calculations.... per square foot	pdl/sq ft	= 1 pdl/sq ft	˜ 1.488 164 Pa
pound per square inch	psi	= 1 lbf/in²
short ton Ton Units of massThere are several similar units of mass or volume called the ton:Others*The long ton is used for petroleum products such as aviation fuel.... per square foot		= 1 sh tn × g / 1 sq ft
torr Torr The torr is a non-International System of Units unit of pressure defined as 1/760 of an Atmosphere . It was named after Evangelista Torricelli, an Italian physicist and mathematician who discovered the principle of the barometer in 1644....	torr	= 101 325/760 Pa	˜ 133.322 4 Pa

Torque

Torque
Torque

**Torque** is the tendency of a force to rotate an object about an axis . Just as a force is a push or a pull, a torque can be thought of as a twist....
Name of unit	Symbol	Definition	Relation to SI Si Si, si, or SI may refer to :... units
Newton metre Newton metre Newton metre is a Physical unit of torque in the SI system. The symbolic form is N m or N?m, and sometimes hyphenated newton-metre.... (SI unit)	N·m	= N × m = kg·m²/s²	= 1 N·m
foot-poundal	ft pdl	= 1 lb·ft²/s²
inch-pound force	in lbf	= g × 1 lb × 1 in	= 0.112 984 829 027 616 7 N·m
foot-pound force Foot-pound force The foot-pound force, or simply foot-pound is a unit of Mechanical work or energy and also a unit of torque ....	ft lbf	= g × 1 lb × 1 ft	= 1.355 817 948 331 400 4 N·m

Energy

Energy
Energy

In physics, **energy** is a scalar physical quantity that describes the amount of Work_ that can be performed by a force. Energy is an attribute of objects and systems that is subject to a conservation law....
Name of unit	Symbol	Definition	Relation to SI Si Si, si, or SI may refer to :... units
joule Joule The joule is the SI derived unit of energy in the International System of Units. It is defined as:One joule is the amount of energy required to perform the following actions:... (SI unit)	J	= m·N = W·s = V·A·s = kg·m²/s²	= 1 J=
electronvolt	eV	= e Elementary charge The elementary charge, usually denoted e, is the electric charge carried by a single proton, or equivalently, the negative of the electric charge carried by a single electron.... × 1 V
rydberg	Ry	= R₈ Rydberg constant The Rydberg Physical constant, named after the Swedish physicist Johannes Rydberg, is a physical constant relating to atomic spectrum in the science of spectroscopy.... ·h Planck constant The Planck constant , also called Planck's constant, is a physical constant used to describe the sizes of quantum in quantum mechanics. It is named after Max Planck, one of the founders of quantum theory.... ·c Speed of light The speed of light in an free space is an important physical constant usually written as c, with a value of 299,792,458 metres per second....
hartree, atomic unit of energy Atomic units Atomic units form a system of units convenient for atomic physics, electromagnetism, and quantum electrodynamics, especially when the focus is on the properties of electrons....	E_h	= m_e·a²·c Speed of light The speed of light in an free space is an important physical constant usually written as c, with a value of 299,792,458 metres per second.... ² (= 2 Ry)
erg Erg An erg is the unit of energy and mechanical work in the Centimetre gram second system of units system of Units of measurements, symbol "erg".... (cgs unit)	erg	= 1 g·cm²/s²	= 10^-7 J
foot-poundal	ft pdl	= 1 lb·ft²/s²
cubic centimetre of atmosphere Atmosphere (unit) The standard atmosphere is an international reference pressure defined as 101,325 Pascal and formerly used as unit of pressure . For practical purposes it has been replaced by the Bar which is 100,000 Pa.... ; standard cubic centimetre	cc atm; scc	= 1 atm × 1 cm³	= 0.101 325 J
inch-pound force	in lbf	= g × 1 lb × 1 in	= 0.112 984 829 027 616 7 J
foot-pound force Foot-pound force The foot-pound force, or simply foot-pound is a unit of Mechanical work or energy and also a unit of torque ....	ft lbf	= g × 1 lb × 1 ft	= 1.355 817 948 331 400 4 J
calorie Calorie The calorie is a pre-SI metric system unit of energy. The unit was first defined by Professor Nicolas Cl?ment in 1824 as a unit of heat. This definition entered French and English dictionaries between 1841 and 1867.... (20 °C)	cal_{20 °C}		˜ 4.1819 J
calorie Calorie The calorie is a pre-SI metric system unit of energy. The unit was first defined by Professor Nicolas Cl?ment in 1824 as a unit of heat. This definition entered French and English dictionaries between 1841 and 1867.... (thermochemical)	cal_th		= 4.184 J
calorie Calorie The calorie is a pre-SI metric system unit of energy. The unit was first defined by Professor Nicolas Cl?ment in 1824 as a unit of heat. This definition entered French and English dictionaries between 1841 and 1867.... (15 °C)	cal_{15 °C}		= 4.1855 J
calorie Calorie The calorie is a pre-SI metric system unit of energy. The unit was first defined by Professor Nicolas Cl?ment in 1824 as a unit of heat. This definition entered French and English dictionaries between 1841 and 1867.... (International Table)	cal_IT		= 4.1868 J
calorie Calorie The calorie is a pre-SI metric system unit of energy. The unit was first defined by Professor Nicolas Cl?ment in 1824 as a unit of heat. This definition entered French and English dictionaries between 1841 and 1867.... (mean)	cal_mean		˜ 4.190 02 J
calorie Calorie The calorie is a pre-SI metric system unit of energy. The unit was first defined by Professor Nicolas Cl?ment in 1824 as a unit of heat. This definition entered French and English dictionaries between 1841 and 1867.... (3.98 °C)	cal_{3.98 °C}		˜ 4.2045 J
kilocalorie; large calorie Calorie The calorie is a pre-SI metric system unit of energy. The unit was first defined by Professor Nicolas Cl?ment in 1824 as a unit of heat. This definition entered French and English dictionaries between 1841 and 1867....	kcal; Cal	= 1000 cal_IT
litre Litre The litre or liter is a unit of volume. There are two official symbols: the Latin letter L in lower and upper case . The lower case L is often written as a cursive l to avoid confusion with the number 1 in antiqua fonts.... -atmosphere Atmosphere (unit) The standard atmosphere is an international reference pressure defined as 101,325 Pascal and formerly used as unit of pressure . For practical purposes it has been replaced by the Bar which is 100,000 Pa....	l atm; sl	= 1 atm × 1 L	= 101.325 J
gallon Gallon A gallon is a measure of volume of approximately four litres. Historically it has had many different definitions, but there are three definitions in current use.... -atmosphere (US)	US gal atm	= 1 atm × 1 gal (US)	= 383.556 849 013 8 J
gallon Gallon A gallon is a measure of volume of approximately four litres. Historically it has had many different definitions, but there are three definitions in current use.... -atmosphere (imperial)	imp gal atm	= 1 atm × 1 gal (imp)	= 460.632 569 25 J
British thermal unit (thermochemical)	BTU_th
British thermal unit (ISO)	BTU_ISO
British thermal unit (63 °F)	BTU_{63 °F}
British thermal unit (60 °F)	BTU_{60 °F}
British thermal unit (59 °F)	BTU_{59 °F}
British thermal unit (International Table)	BTU_IT
British thermal unit (mean)	BTU_mean
British thermal unit (39 °F)	BTU_{39 °F}
Celsius Celsius Celsius is a temperature scale that is named after the Swedish astronomer Anders Celsius , who developed a similar temperature scale two years before his death.... heat unit (International Table)	CHU_IT	= 1 BTU_IT × 1 K/°R
cubic foot of atmosphere; standard cubic foot	cu ft atm; scf	= 1 atm × 1 ft³
cubic yard Yard A yard is a Units of measurement of length in several different systems, including English units, Imperial units, and United States customary units.... of atmosphere; standard cubic yard Yard A yard is a Units of measurement of length in several different systems, including English units, Imperial units, and United States customary units....	cu yd atm; scy	= 1 atm × 1 yd³
cubic foot of natural gas		= 1000 BTU_IT
horsepower Horsepower Horsepower is the name of several non-International System of Units units of power . It was originally defined to allow the output of steam engines to be measured and compared with the power output of draft horses.... -hour Hour The hour is a unit of time. It is not an SI unit but is Non-SI units accepted for use with SI....	hp·h	= 1 hp × 1 h
kilowatt-hour; Board of Trade Unit	kW·h; B.O.T.U.	= 1 kW × 1 h
thermie	th	= 1 Mcal_IT
therm (U.S.)		= 100 000 BTU_{59 °F}
therm (E.C.)		= 100 000 BTU_IT
ton Ton Units of massThere are several similar units of mass or volume called the ton:OthersThe long ton is used for petroleum products such as aviation fuel.... of TNT Trinitrotoluene Trinitrotoluene* , or more specifically, 2,4,6-trinitrotoluene, is a chemical compound with the formula C6H23CH3....	tTNT	= 1 Gcal_th
barrel of oil equivalent Barrel of oil equivalent The barrel of oil equivalent is a units of energy based on the approximate energy released by burning one Barrel of crude oil. The US Internal Revenue Service defines it as equal to 5.8 ? 106 BTU....	bboe	˜ 5.8 ×10⁶ BTU_{59 °F}
ton of coal equivalent	TCE	= 7 Gcal_th
ton of oil equivalent Ton of oil equivalent The tonne of oil equivalent is a units of energy: the amount of energy released by burning one tonne of crude oil, approximately 42 joule .The toe is sometimes used for large amounts of energy, as it can be more intuitive to visualise, say, the energy released by burning 1000 tonnes of oil than 42,000 1000000000 joules ....	TOE	= 10 Gcal_th
quad Quad (energy) A quad is a unit of energy equal to 1015 BTU, or 1.055 × 1018 joules in SI units.The unit is used by the U.S. Department of Energy in discussing world and national energy budgets....		= 10¹⁵ BTU_IT

Power

Power
Power (physics)

In physics, **power** is the rate at which mechanical work is performed or energy is transmitted, or the amount of energy required or expended for a given unit of time....
Name of unit	Symbol	Definition	Relation to SI Si Si, si, or SI may refer to :... units
watt WATT WATT is a radio station broadcasting a News radio-Talk radio-Sports radio format. Licensed to Cadillac, Michigan, it first began broadcasting in 1945.... (SI unit)	W	= J/s = N·m/s = kg·m²/s³	= 1 W=
lusec	lusec	= 1 L·µmHg/s
foot-pound-force Pound-force The pound-force or simply pound is a Units of measurement of force.... per hour Hour The hour is a unit of time. It is not an SI unit but is Non-SI units accepted for use with SI....	ft lbf/h	= 1 ft lbf/h
atmosphere cubic centimetre per minute Minute A minute is a unit of measurement of time or of angle.The minute is a Unit of measurement of time equal to 1/60th of an hour or 60 seconds. In the Coordinated Universal Time time scale, a minute occasionally has 59 or 61 seconds; see leap second....	atm ccm	= 1 atm × 1 cm³/min
foot-pound-force Pound-force The pound-force or simply pound is a Units of measurement of force.... per minute Minute A minute is a unit of measurement of time or of angle.The minute is a Unit of measurement of time equal to 1/60th of an hour or 60 seconds. In the Coordinated Universal Time time scale, a minute occasionally has 59 or 61 seconds; see leap second....	ft lbf/min	= 1 ft lbf/min
atmosphere–cubic centimetre per second Second The second , sometimes abbreviated sec., is the name of a units of measurement of time, and is the International System of Units SI base unit of time....	atm ccs	= 1 atm × 1 cm³/s	= 0.101 325 W
BTU (International Table) per hour Hour The hour is a unit of time. It is not an SI unit but is Non-SI units accepted for use with SI....	BTU_IT/h	= 1 BTU_IT/h	˜ 0.293 071 W
atmosphere–cubic foot per hour Hour The hour is a unit of time. It is not an SI unit but is Non-SI units accepted for use with SI....	atm cfh	= 1 atm × 1 cu ft/h	= 0.797 001 244 704 W
foot-pound-force Pound-force The pound-force or simply pound is a Units of measurement of force.... per second Second The second , sometimes abbreviated sec., is the name of a units of measurement of time, and is the International System of Units SI base unit of time....	ft lbf/s	= 1 ft lbf/s	= 1.355 817 948 331 400 4 W
litre Litre The litre or liter is a unit of volume. There are two official symbols: the Latin letter L in lower and upper case . The lower case L is often written as a cursive l to avoid confusion with the number 1 in antiqua fonts.... -atmosphere per minute Minute A minute is a unit of measurement of time or of angle.The minute is a Unit of measurement of time equal to 1/60th of an hour or 60 seconds. In the Coordinated Universal Time time scale, a minute occasionally has 59 or 61 seconds; see leap second....	L·atm/min	= 1 atm × 1 L/min	= 1.688 75 W
calorie Calorie The calorie is a pre-SI metric system unit of energy. The unit was first defined by Professor Nicolas Cl?ment in 1824 as a unit of heat. This definition entered French and English dictionaries between 1841 and 1867.... (International Table) per second Second The second , sometimes abbreviated sec., is the name of a units of measurement of time, and is the International System of Units SI base unit of time....	cal_IT/s	= 1 cal_IT/s	= 4.1868 W
BTU (International Table) per minute Minute A minute is a unit of measurement of time or of angle.The minute is a Unit of measurement of time equal to 1/60th of an hour or 60 seconds. In the Coordinated Universal Time time scale, a minute occasionally has 59 or 61 seconds; see leap second....	BTU_IT/min	= 1 BTU_IT/min	˜ 17.584 264 W
atmosphere-cubic foot per minute Minute A minute is a unit of measurement of time or of angle.The minute is a Unit of measurement of time equal to 1/60th of an hour or 60 seconds. In the Coordinated Universal Time time scale, a minute occasionally has 59 or 61 seconds; see leap second....	atm·cfm	= 1 atm × 1 cu ft/min	= 47.820 074 682 24 W
square foot equivalent direct radiation	sq ft EDR	= 240 BTU_IT/h	˜ 70.337 057 W
litre-atmosphere per second	L·atm/s	= 1 atm × 1 L/s	= 101.325 W
horsepower Horsepower Horsepower is the name of several non-International System of Units units of power . It was originally defined to allow the output of steam engines to be measured and compared with the power output of draft horses.... (metric)	hp	= 75 m kgf/s	= 735.498 75 W
horsepower Horsepower Horsepower is the name of several non-International System of Units units of power . It was originally defined to allow the output of steam engines to be measured and compared with the power output of draft horses.... (European electrical)	hp	= 75 kp·m/s	= 736 W
horsepower Horsepower Horsepower is the name of several non-International System of Units units of power . It was originally defined to allow the output of steam engines to be measured and compared with the power output of draft horses.... (Imperial mechanical)	hp	= 550 ft lbf/s	= 745.699 871 582 270 22 W
horsepower Horsepower Horsepower is the name of several non-International System of Units units of power . It was originally defined to allow the output of steam engines to be measured and compared with the power output of draft horses.... (Imperial electrical)	hp		= 746 W
ton Ton Units of massThere are several similar units of mass or volume called the ton:Others*The long ton is used for petroleum products such as aviation fuel.... of air conditioning		= 1 t ice melted / 24 h	˜ 3504. W
poncelet Poncelet The poncelet is an obsolete unit of power, once used in France and replaced by cheval vapeur . The unit was named after Jean-Victor Poncelet....	p	= 100 m kgf/s	= 980.665 W
BTU (International Table) per second Second The second , sometimes abbreviated sec., is the name of a units of measurement of time, and is the International System of Units SI base unit of time....	BTU_IT/s	= 1 BTU_IT/s
atmosphere-cubic foot per second Second The second , sometimes abbreviated sec., is the name of a units of measurement of time, and is the International System of Units SI base unit of time....	atm cfs	= 1 atm × 1 cu ft/s
ton Ton Units of massThere are several similar units of mass or volume called the ton:Others*The long ton is used for petroleum products such as aviation fuel.... of refrigeration (IT)		= 1 BTU_IT × 1 sh tn/lb ÷ 10 min/s
ton Ton Units of massThere are several similar units of mass or volume called the ton:Others*The long ton is used for petroleum products such as aviation fuel.... of refrigeration (Imperial)		= 1 BTU_IT × 1 lng tn/lb ÷ 10 min/s
boiler horsepower Horsepower Horsepower is the name of several non-International System of Units units of power . It was originally defined to allow the output of steam engines to be measured and compared with the power output of draft horses....	bhp	˜ 34.5 lb/h × 970.3 BTU_IT/lb

Angular momentum

Action, Angular momentum
Name of unit	Symbol	Definition	Relation to SI Si Si, si, or SI may refer to :... units
SI unit	J·s	= kg·m²/s	= 1 J·s
atomic unit of action Atomic units Atomic units form a system of units convenient for atomic physics, electromagnetism, and quantum electrodynamics, especially when the focus is on the properties of electrons....	au	= ? = h Planck constant The Planck constant , also called Planck's constant, is a physical constant used to describe the sizes of quantum in quantum mechanics. It is named after Max Planck, one of the founders of quantum theory.... /2p Pi Pi or p is a mathematical constant whose value is the ratio of any circle's circumference to its diameter in Euclidean geometry; this is the same value as the ratio of a circle's area to the square of its radius....
cgs unit	erg·s		= 10^-7 J·s

Capacitance

Capacitor
Capacitor

A **capacitor** or **condenser** is a Passive component electronic component consisting of a pair of electrical conductor separated by a dielectric....
's Ability to Store Charge
Charge

**Charge** or **charged** may refer to:...
Name of unit	Symbol	Definition	Relation to SI Si Si, si, or SI may refer to :... units
farad Farad The farad is the SI unit of capacitance. The farad is named after the British physicist Michael Faraday....	F	amount of capacitance for which a potential difference of one volt results in a static charge of one coulomb

Density

The SI

Si, si, or SI may refer to :...
unit for density is:

kilogram
Kilogram

The kilogram or kilogrammeThe spelling kilogram is used by the International Committee for Weights and Measures and the U.S....
s per cubic metre
Cubic metre

The cubic metre is the SI derived unit of volume. It is the volume of a cube with edges one metre in length. An alternative name, which allowed a different usage with SI prefix, was the st?re....
(kg/m³)

Metric units outside the SI

kilogram
Kilogram

The kilogram or kilogrammeThe spelling kilogram is used by the International Committee for Weights and Measures and the U.S....
s per litre
Litre

The litre or liter is a unit of volume. There are two official symbols: the Latin letter L in lower and upper case . The lower case L is often written as a cursive l to avoid confusion with the number 1 in antiqua fonts....
(kg/L). Water
Water

Water is a common chemical substance that is essential for the survival of all known forms of life. In typical usage, water refers only to its liquid form or States of matter, but the substance also has a solid state, ice, and a gaseous state, water vapor or steam....
generally has a density around 1 kg/L, making this a convenient unit.
kilograms per cubic decimeter (kg/dm³)
gram
Gram

The gram , ; symbol g, is a Physical unit of mass.Originally defined as "the absolute weight of a volume of pure water equal to the cube of the hundredth part of a metre, and at the temperature of melting ice" , a gram is now defined as one one-thousandth of the SI base unit, the kilogram, or Scientific notation kg, which itself is...
s per millilitre (g/mL),
grams per cubic centimeter (g/cc or g/cm³).

These are numerically equivalent to kg/L (1 kg/L = 1 kg/dm³ = 1 g/cm³ = 1 g/mL).

In U.S. customary units or Imperial units, the units of density include:

ounce
Ounce

This article is about the unit of mass. For the unit of force, see Pound-force. For the unit of volume, see Fluid ounce. For all other uses, see Ounce ....
s per cubic inch
Cubic inch

A cubic inch is a non-International System of Units Units of measurement of volume, equal to the volume of a cube with sides of one inch.Cubic inches are still sometimes used as a unit of measurement in the United States and Canada, although SI is continuing to gradually displace non-SI usage....
(oz/cu in)
pound
Pound (mass)

The pound or pound-mass is a Units of measurement of massused in the Imperial unit, United States customary units and other systems of measurement....
s per cubic inch (lb/cu in)
pounds per cubic foot
Cubic foot

The cubic foot is an Imperial unit and United States customary units unit of volume, used in the United States, Canada and the United Kingdom. It is defined as the volume of a cube with sides of one foot in length.|-...
(lb/cu ft)
pounds per cubic yard
Cubic yard

A cubic yard is an Imperial unit / U.S. customary unit unit of volume, used in the United States, Canada, and the UK. It is defined as the volume of a cube with sides of 1 yard in length....
(lb/cu yd)
pounds per gallon
Gallon

A gallon is a measure of volume of approximately four litres. Historically it has had many different definitions, but there are three definitions in current use....
(for U.S. or imperial gallons) (lb/gal)
pounds per U.S. bushel
Bushel

A bushel is a unit of dry measure, usually subdivided into eight local gallons in the systems of Imperial units and U.S. customary units. It is used for volumes of dry measure commodity, not liquids, most often in agriculture....
(lb/bu)
slugs
Slug (mass)

The slug is an English unit of mass. It is a mass that accelerates by 1 ft/s? when a force of one pound-force is exerted on it. Therefore a slug has a mass of 32.17405 pounds or 14.5939 kg....
per cubic foot.

Electric current

Electric current
Electric current

**Electric current** is the flow of electric charge. The electric charge may be either electrons or ions.The International System of Units unit of electric current intensity is the ampere....
Name of unit	Symbol	Definition	Relation to SI Si Si, si, or SI may refer to :... units
ampere Ampere The ampere is the International System of Units unit of electric current. The ampere, in practice often shortened to amp, is an SI base unit, and is named after Andr?-Marie Amp?re, one of the main discoverers of electromagnetism.... (SI base unit SI base unit The International System of Units defines seven dimensional analysis SI base units. All other physical units can be derived from these base units: these are known as SI derived units.... )	A		1 A
esu per second; statampere (cgs unit)	esu/s	= (0.1 A·m/s) /c Speed of light The speed of light in an free space is an important physical constant usually written as c, with a value of 299,792,458 metres per second....
electromagnetic unit; abampere (cgs unit)	abamp		= 10 A

Magnetic field

also known as "magnetic flux density" and "magnetic induction"

Magnetic field
Magnetic field

A *magnetism field* is a vector field which can exert a *magnetic force* on moving electric charges and on magnetic dipoles . When placed in a magnetic field, magnetic dipoles tend to align their axes parallel to the magnetic field....
Name of unit	Symbol	Definition	Relation to SI Si Si, si, or SI may refer to :... units
teslas	T	webers per square meter	(SI unit)
amperes/meter	A/m
gauss Gauss (unit) The gauss, abbreviated as G, is the cgs units of measurement of a magnetic field B , named after the German mathematician and physicist Carl Friedrich Gauss....	G	=maxwell Maxwell (unit) The maxwell, abbreviated as Mx, is the compound derived centimetre gram second system of units unit of magnetic flux. The unit was previously called a line.... / cm²	10^-4 T

Magnetic flux

magnetic flux
Magnetic flux

**Magnetic flux**, represented by the Greek letter F , is a measure of quantity of magnetism, taking into account the strength and the extent of a magnetic field....
Name of unit	Symbol	Definition	Relation to SI Si Si, si, or SI may refer to :... units
weber Weber Weber is a surname of German language origin, derived from the noun meaning "Weaving". The German pronunciation is "", while in English it is more likely to be pronounced "" or ""....	Wb	magnetic flux which, linking a circuit of one turn, would produce in it an electromotive force of 1 volt if it were reduced to zero at a uniform rate in 1 second

Electric charge

Electric charge
Electric charge

**Electric charge** is a fundamental conserved property of some subatomic particles, which determines their electromagnetic interaction. Electrically charged matter is influenced by, and produces, electromagnetic fields....
Name of unit	Symbol	Definition	Relation to SI Si Si, si, or SI may refer to :... units
coulomb Coulomb The coulomb is the SI unit of electric charge. It is named after Charles-Augustin de Coulomb.... (SI unit)	C	= A·s	= 1 C
atomic unit of charge Atomic units Atomic units form a system of units convenient for atomic physics, electromagnetism, and quantum electrodynamics, especially when the focus is on the properties of electrons....	au	= e Elementary charge The elementary charge, usually denoted e, is the electric charge carried by a single proton, or equivalently, the negative of the electric charge carried by a single electron....
statcoulomb Statcoulomb The statcoulomb or franklin or electrostatic unit of charge is the Units of measurement for electrical charge used in the centimetre gram second system of units electrostatic system of units.... ; franklin; electrostatic unit (cgs unit)	statC; Fr; esu	= (0.1 A·m) /c Speed of light The speed of light in an free space is an important physical constant usually written as c, with a value of 299,792,458 metres per second....
abcoulomb Abcoulomb The abcoulomb or electromagnetic unit of charge is the basic physical unit of electric charge in the centimetre gram second system of units.... ; electromagnetic unit (cgs unit)	abC; emu		= 10 C
faraday	F	= 1 mol × N_A Avogadro's number The Avogadro constant , also called Avogadro's number, is the number of "elementary entities" in one mole , that is , the number of atoms in exactly 12 grams of carbon-12.... ·e Elementary charge The elementary charge, usually denoted e, is the electric charge carried by a single proton, or equivalently, the negative of the electric charge carried by a single electron....	˜ 96,485.3383 C

Electric Dipole

Electric Dipole
Name of unit	Symbol	Definition	Relation to SI Si Si, si, or SI may refer to :... units
coulomb metre	C•m	= coulomb × metre

Electromotive force

Voltage
Voltage

**Electrical tension** is the potential difference between two points of an electrical or electronic circuit, expressed in volts. It is the measurement of the potential for an electric field to cause an electric current in an electrical conductor....
, Electromotive force
Name of unit	Symbol	Definition	Relation to SI Si Si, si, or SI may refer to :... units
volt Volt The volt is the SI SI derived unit of electric potential difference or electromotive force, commonly known as voltage. It is named in honor of the Lombard physicist Alessandro Volta , who invented the voltaic pile, possibly the first chemical battery .... (SI unit)	V	= kg·m²/(A·s³)	= 1 V
abvolt (cgs unit)	abV
statvolt Statvolt The statvolt is the unit of voltage and electrical potential used in the cgs system of units. The conversion isIt is a useful unit for electromagnetism because one statvolt per centimetre is equal in magnitude to one Gauss .... (cgs unit)	statV	= c Speed of light The speed of light in an free space is an important physical constant usually written as c, with a value of 299,792,458 metres per second.... · (1 µJ/A·m)	= 299.792 458 V

Electrical resistance

Electrical resistance
Electrical resistance

The **electrical resistance** of an object is a measure of its opposition to the passage of a steady electrical current. An object of uniform cross section will have a resistance proportional to its length and inversely proportional to its cross-sectional area, and proportional to the resistivity of the material....
Name of unit	Symbol	Definition	Relation to SI Si Si, si, or SI may refer to :... units
ohm (SI unit)	O	= V/A	= kg·m²/(A²·s³)

Inductance

Inductance
Inductance

**Inductance** is the property in an electrical circuit where a change in the current flowing through that circuit induces an Electromotive force that opposes the change in current ....
Name of unit	Symbol	Definition	Relation to SI Si Si, si, or SI may refer to :... units
henry (SI unit)	H	=	= 1 H

Dynamic viscosity

Dynamic viscosity
Viscosity

**Viscosity** is a measure of the Drag of a fluid which is being deformed by either shear stress or extensional stress. In everyday terms , viscosity is "thickness"....
Name of unit	Symbol	Definition	Relation to SI Si Si, si, or SI may refer to :... units
pascal second (SI unit)	Pa·s	= N·s/m² , kg/(m·s)	= 1 Pa·s
poise Poise The poise is the unit of dynamic viscosity in the centimetre gram second system of units. It is named after Jean Louis Marie Poiseuille.The analogous unit in the SI is the pascal second :... (cgs unit)	P		= 10^-1 Pa·s

Kinematic viscosity

Kinematic viscosity
Viscosity

**Viscosity** is a measure of the Drag of a fluid which is being deformed by either shear stress or extensional stress. In everyday terms , viscosity is "thickness"....
Name of unit	Symbol	Definition	Relation to SI units Si Si, si, or SI may refer to :...
SI unit	m²/s	= m²/s	= 1 m²/s
stokes (cgs unit)	St		= 10^-4 m²/s

Information entropy

Information entropy
Information entropy

In information theory, **entropy** is a measure of the uncertainty associated with a random variable. The term by itself in this context usually refers to the **Shannon entropy**, which quantifies, in the sense of an expected value, the self-information contained in a message, usually in units such as bits....
Name of unit	Symbol	Definition	Relation to SI units Si Si, si, or SI may refer to :...	Relation to bits
SI unit	J/K	= J/K	= 1 J/K
nat Nat (information) A nat is a logarithmic unit of information or information entropy, based on natural logarithms and powers of e , rather than the powers of 2 and binary logarithm which define the bit.... ; nip; nepit	nat	= k_B	= 1.3806505(23) × 10^-23 J/K
bit Bit A bit is a binary numeral system numerical digit, taking a value of either 0 or 1. Binary digits are a basic unit of information Computer data storage and transmission in digital computing and digital information theory.... ; shannon	bit; b; Sh	= ln(2) × k_B	= 9.569940(16) × 10^-24 J/K	= 1 bit
ban Ban (information) A ban, sometimes called a hartley or a dit , is a logarithmic unit which measures information or information entropy, based on base 10 logarithms and powers of 10, rather than the powers of 2 and binary logarithm which define the bit.... ; hartley	ban; Hart	= ln(10) × k_B	= 3.1790653(53) × 10^-23 J/K
nibble Nibble A nibble is the computing term for a four-bit aggregation, or half an octet . As a nibble contains 4 bits, there are sixteen possible values, so a nibble corresponds to a single hexadecimal digit ....		= 4 bits	= 3.8279760(64) × 10^-23 J/K	= 2² bit
byte Byte A byte is a basic unit of measurement of Computer storage in computer science. In many computer architectures it is a Byte addressing memory address space....	B	= 8 bits	= 7.655952(13) × 10^-23 J/K	= 2³ bit
kilobyte Kilobyte Kilobyte is a unit of Computer data storage equal to either 1,024 bytes or 1,000 bytes , depending on context.It is abbreviated in a number of ways: KB, kB, K and Kbyte.... (decimal)	kB	= 1000 B	= 7.655952(13) × 10^-20 J/K
kilobyte Kilobyte Kilobyte is a unit of Computer data storage equal to either 1,024 bytes or 1,000 bytes , depending on context.It is abbreviated in a number of ways: KB, kB, K and Kbyte.... (kibibyte Kibibyte A kibibyte is a unit of information or computer storage, established by the International Electrotechnical Commission in 2000. Its symbol is KiB.... )	KB; KiB	= 1024 B	= 7.839695(13) × 10^-20 J/K	= 2¹⁰*2³ bit

Often, information entropy is measured in shannons, whereas the (discrete) storage space of digital devices is measured in bits. Thus, uncompressed redundant data occupy more than one bit of storage per shannon of information entropy. The multiples of a bit listed above are usually used with this meaning. Other times the bit is used as a measure of information entropy and is thus a synonym of shannon.

Temperature

Note: see Temperature conversion for more detail

Temperature
Temperature

In physics, **temperature** is a physical property of a Physical system that underlies the common notions of hot and cold; something that feels hotter generally has the greater temperature....
Name of unit	Symbol	Definition	Conversion to Fahrenheit
Kelvin Kelvin The kelvin is a Units of measurement of temperature and is one of the seven SI base units. The Kelvin scale is a Thermodynamic temperature scale where absolute zero, the theoretical absence of all thermal energy, is zero ....	K	0 K = absolute zero (when an ideal gas would theoretically occupy no space)	1 K
degree centesimal	°C	befor 1954, 0 °C = triple point of H₂O; after 1954, 0.01 °C = triple point of H₂O	[K] ˜ [°C] + 273.15
degree Celsius Celsius Celsius is a temperature scale that is named after the Swedish astronomer Anders Celsius , who developed a similar temperature scale two years before his death....	°C	0°C = freezing pt. of H₂O, 100°C = boiling pt. of H₂O at 1 atm	[K] = [°C] + 273.15
degree Rankine	°R; °Ra	0 °R = absolute zero	[K] = [°R] × 5/9
degree Fahrenheit Fahrenheit Fahrenheit is a temperature scale named after the physicist Daniel Gabriel Fahrenheit , who proposed it in 1724. Today, the scale has largely been replaced by the Celsius scale; it is still in use for non-scientific purposes in the United States and a few other countries such as Belize....	°F	0 °F = freezing pt. of H₂O+NaCl, 180°F between freezing and boiling pt of H₂O @ 1atm	[K] = ([°F] + 459.67) × 5/9
degree Delisle Delisle Delisle or De Lisle may refer to...	°De		[K] = 373.15 - [°De] × 2/3
degree Newton Newton The newton is the International System of Units SI derived unit of force, named after Isaac Newton in recognition of his work on classical mechanics....	°N		[K] = [°N] × 100/33 + 273.15
degree Réaumur Réaumur The R?aumur scale , also known as the "octogesimal division", is a temperature scale in which the melting point and boiling points of water are set to 0 and 80 degrees respectively....	°Ré		[K] = [°Ré] × 5/4 + 273.15
degree Rømer	°Rø		[K] = ([°Rø] - 7.5) × 40/21 + 273.15

Radioactivity

Radioactivity
Name of unit	Symbol	Definition	Relation to SI Si Si, si, or SI may refer to :... units
Becquerel Becquerel The becquerel is the SI derived unit of Radioactive decay. 1 Bq is defined as the activity of a quantity of radioactive material in which one atomic nucleus decays per second.... (SI base unit SI base unit The International System of Units defines seven dimensional analysis SI base units. All other physical units can be derived from these base units: these are known as SI derived units.... )	Bq	= disintegration per second s^-1	= 1 Bq
Rutherford Rutherford Rutherford may refer to:...	rd	= 1 MBq	= 1 * 10⁶ Bq
curie Curie The curie is a unit of Radioactive decay, defined asThis is roughly the activity of 1 gram of the radium isotope 226Ra, a substance studied by the pioneers of radiology, Marie Curie and Pierre Curie....	Ci	= 3.7 * 10¹⁰ Bq	= 3.7 * 10¹⁰ Bq

Radioactivity - absorbed dose

Radioactivity - absorbed dose
Absorbed dose

**Absorbed dose** is a measure of the energy deposited in a medium by ionizing radiation. It is equal to the energy deposited per unit mass of medium, and so has the unit J/kg, which is given the special name gray ....
Name of unit	Symbol	Definition	Relation to SI Si Si, si, or SI may refer to :... units
gray Gray (unit) The gray is the SI unit of absorbed dose due to ionizing radiation ....	Gy	= 1J/kg = 1m²·s^-2	= 1 Gy
rad RAD Rad may mean:* Rad , a villainous character in AC Comics's Femforce* Rad , a 1986 release about a young BMX rider* Rad , several fictional characters in the Transformers toy line...	rad	= 0.01 Gy	= 0.01 Gy

Radioactivity - equivalent dose

Radioactivity - equivalent dose
Equivalent dose

The **equivalent dose** is a measure of the radiation dose to tissue where an attempt has been made to allow for the different relative biological effects of different types of ionizing radiation....
Name of unit	Symbol	Definition	Relation to SI Si Si, si, or SI may refer to :... units
Sievert Sievert The sievert is the SI derived unit of equivalent dose. It attempts to reflect the biological effects of radiation as opposed to the physical aspects, which are characterised by the absorbed dose, measured in Gray .... (SI base unit SI base unit The International System of Units defines seven dimensional analysis SI base units. All other physical units can be derived from these base units: these are known as SI derived units.... )	Sv		= 1 Sv
Röntgen equivalent man Röntgen equivalent man The r?ntgen equivalent in man or rem is a unit of radiation dose. It is the product of the absorbed dose in r?ntgens and the biological efficiency of the radiation....	rem	= 0.01 Sv	= 0.01 Sv

Software tools

Home and office computers come with converters in bundled spreadsheet applications or can access free converters via the Internet. Units and measurements can be easily converted using these tools, but only if the units are explicitly defined and the conversion is compatible (e.g., cmHg to kPa).

Free conversion software

Units (software), a popular cross-platform
Cross-platform

In computing, cross-platform is a term used to refer to computer software or computing methods and concepts that are implemented and inter-operate on multiple computer platforms....
command-line utility
, unit converter for Mozilla Firefox browsers
, portable application
Portable application

A portable application is a computer software program that runs from a removable storage device such as a CD-ROM drive, USB flash drive, flash memory, or floppy disk....
converting utility
calculla - online web converters

General commercial sources of converters

Advanced electronic calculators
Calculator

A calculator is a device for performing mathematical calculations, distinguished from a computer by having a limited problem solving ability and an interface optimized for interactive calculation rather than programming....
have unit-conversion functionality.
Spreadsheet
Spreadsheet

A spreadsheet is a computer application that simulates a paper worksheet. It displays multiple cells that together make up a grid consisting of rows and columns, each cell containing either alphanumeric text or numeric values....
programs usually provide conversion functions or formula
Formula

In mathematics and in the sciences, a formula is a concise way of expressing information symbolically , or a general relationship between quantities....
s or the user can write their own.
Commercial mathematical, scientific and technical applications often include converters.

External links

(PDF)

Conversion of units

Techniques

Rounding of results

Tables of conversion factors

Legend

Luminance

Length

Area

Volume

Angle

Solid angle

Mass

Time

Speed or velocity

Acceleration

Force

Pressure or mechanical stress

Torque

Energy

Power

Angular momentum

Capacitance

Density

Electric current

Magnetic field

Magnetic flux

Electric charge

Electric Dipole

Electromotive force

Electrical resistance

Inductance

Dynamic viscosity

Kinematic viscosity

Information entropy

Temperature

Radioactivity

Radioactivity - absorbed dose

Radioactivity - equivalent dose

Software tools

Free conversion software

General commercial sources of converters

See also

External links