All Topics  
Kilometres per hour

 

 
   Email Print
   Bookmark   Link
 

 

Kilometres per hour
 
 
  Topics Kilometres per hour Topic Home

The kilometre per hour (American English
American English

PhonologyIn many ways, compared to English language in England, North American English is conservative in its phonology. Some distinctive accents can be found on the East Coast of the United States , partly because these areas were in contact with England, and imitated prestigious varieties of English English at a time when those varieties we...
: kilometer per hour) is a unit of both 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....
 (scalar
Scalar (physics)

In physics, a scalar is a simple physical quantity that is not changed by coordinate system rotations or translations , or by Lorentz transformations or space-time translations ....
) and 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....
 (vector). The unit symbol is km/h or km·h-1; however, the colloquial abbreviations "kph" and "kmph" are sometimes also used in English-speaking countries, in analogy to mph
MPH

mph is a three-letter acronym that refers to miles per hour, a measurement of speedMPH may also refer to:* Master of Public Health, a Master's degree in public health...
, although these are not in accordance with international scientific standards. In North American slang
Slang

Slang is the use of highly informal words and expressions that are not considered standard in the speaker's dialect or language....
 and military usage, km/h (as well as km) is commonly pronounced, and sometimes even written, as klicks or kays (K's), although these may also be used to refer to kilometre
Kilometre

The kilometre , symbol km is a Units of measurement of length in the metric system, equal to one thousand metres.Slang terms for kilometre include click and kay ....
s.

Worldwide, the km/h is the most commonly used speed unit on road signs and car speedometers (where it is typically abbreviated as kph).






Discussion
Ask a question about 'Kilometres per hour'
Start a new discussion about 'Kilometres per hour'
Answer questions from other users
Full Discussion Forum



Encyclopedia


The kilometre per hour (American English
American English

PhonologyIn many ways, compared to English language in England, North American English is conservative in its phonology. Some distinctive accents can be found on the East Coast of the United States , partly because these areas were in contact with England, and imitated prestigious varieties of English English at a time when those varieties we...
: kilometer per hour) is a unit of both 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....
 (scalar
Scalar (physics)

In physics, a scalar is a simple physical quantity that is not changed by coordinate system rotations or translations , or by Lorentz transformations or space-time translations ....
) and 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....
 (vector). The unit symbol is km/h or km·h-1; however, the colloquial abbreviations "kph" and "kmph" are sometimes also used in English-speaking countries, in analogy to mph
MPH

mph is a three-letter acronym that refers to miles per hour, a measurement of speedMPH may also refer to:* Master of Public Health, a Master's degree in public health...
, although these are not in accordance with international scientific standards. In North American slang
Slang

Slang is the use of highly informal words and expressions that are not considered standard in the speaker's dialect or language....
 and military usage, km/h (as well as km) is commonly pronounced, and sometimes even written, as klicks or kays (K's), although these may also be used to refer to kilometre
Kilometre

The kilometre , symbol km is a Units of measurement of length in the metric system, equal to one thousand metres.Slang terms for kilometre include click and kay ....
s.

Worldwide, the km/h is the most commonly used speed unit on road signs and car speedometers (where it is typically abbreviated as kph). Therefore, it is far more common in everyday usage than the proper SI
International System of Units

The International System of Units is the modern form of the metric system and is generally a system devised around the convenience of the number ten....
 unit of speed, m/s
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....
. Along with the kW·h, km/h is the most commonly used metric unit based on the 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....
, which is only a "non-SI unit accepted for use with the International System of Units" by the BIPM
International Bureau of Weights and Measures

File:Metric seal.svgThe International Bureau of Weights and Measures , is an international standards organization, one of three such organizations established to maintain the International System of Units under the terms of the Metre Convention ....
.

Conversions

  • 3.6 km/h = 1 m/s, the 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 ....
     of speed, 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....
  • 1 km/h ˜ 0.277 78 m/s
  • 1 km/h ˜ 0.621 37 mph
    Miles per hour

    The mile per hour is a physical unit of speed, expressing the number of Mile covered per hour.It is currently the Unit of measurement used for speed limits, and speeds, on roads in the United Kingdom and United States....
     ˜ 0.911 34 feet per second
    Feet per second

    The foot per second is a physical unit of both speed and velocity . It expresses the distance in Foot Abbreviations include ft/s, ft/sec and fps, and the rarely used scientific notation ft s-1....
  • 1 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....
     = 1.852 km/h (exactly)
  • 1 mile per hour = 1.609344 km/h (~1.61 km/h)
  • 1 kilometre per hour = ~0.62 miles per hour


See also

  • Orders of magnitude (speed)
    Orders of magnitude (speed)

    To help compare different orders of magnitude, the following list describes various speed levels between 1.3 metre per second and 3 m/s....


External links

  • Online conversions for speed units: km/h, mph, knots, etc.