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Square foot
 
 
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The square foot is an imperial unit
Imperial unit

Imperial units or the imperial system is a system of units, first defined in the British Weights and Measures Act of 1824, later refined and reduced....
 / U.S. customary unit (non-SI
Si

Si, si, or SI may refer to :...
 non-metric
Metric system

The metric system is an international decimalised systems of measurement, founded by France in 1791, that is the common system of Unit of measurement used by most of the world....
) of area
Area

Area is a quantity expressing the two-dimensional size of a defined part of a surface, typically a region bounded by a closed curve. The term surface area refers to the total area of the exposed surface of a 3-dimensional solid, such as the sum of the areas of the exposed sides of a polyhedron....
, used mainly in the United States
United States

The United States of America is a Federal government constitutional republic comprising U.S. state and a federal district. The country is situated mostly in central North America, where its Contiguous United States and Washington, D.C., the Capital districts and territories, lie between the Pacific Ocean and Atlantic Oceans, Borders of the U...
 and United Kingdom
United Kingdom

The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom , the UK or Britain,is a sovereign state located off the northwestern coast of continental Europe....
. It is defined as the area of a square
Square (geometry)

In Euclidean geometry, a square is a regular polygon with four equal sides and four equal angles . A square with vertices ABCD would be denoted ....
 with sides of 1 foot (0.333... 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....
s, 12 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....
es, or 0.3048 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....
s) in 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....
.

e is no universally agreed symbol but the following are used:

A symbol for square foot, square feet, and "per square foot" commonly used in architecture
Architecture

The term architecture can refer to a process, a profession or documentation.As a process, architecture is the activity of designing and construction buildings and other physical structures by a person or a computer, primarily to provide shelter....
, real estate
Real estate

Real estate is a law term that encompasses land along with anything permanently affixed to the land, such as buildings, specifically property that is fixed in location. and interior space plans is a simple square with a slash through it.






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The square foot is an imperial unit
Imperial unit

Imperial units or the imperial system is a system of units, first defined in the British Weights and Measures Act of 1824, later refined and reduced....
 / U.S. customary unit (non-SI
Si

Si, si, or SI may refer to :...
 non-metric
Metric system

The metric system is an international decimalised systems of measurement, founded by France in 1791, that is the common system of Unit of measurement used by most of the world....
) of area
Area

Area is a quantity expressing the two-dimensional size of a defined part of a surface, typically a region bounded by a closed curve. The term surface area refers to the total area of the exposed surface of a 3-dimensional solid, such as the sum of the areas of the exposed sides of a polyhedron....
, used mainly in the United States
United States

The United States of America is a Federal government constitutional republic comprising U.S. state and a federal district. The country is situated mostly in central North America, where its Contiguous United States and Washington, D.C., the Capital districts and territories, lie between the Pacific Ocean and Atlantic Oceans, Borders of the U...
 and United Kingdom
United Kingdom

The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom , the UK or Britain,is a sovereign state located off the northwestern coast of continental Europe....
. It is defined as the area of a square
Square (geometry)

In Euclidean geometry, a square is a regular polygon with four equal sides and four equal angles . A square with vertices ABCD would be denoted ....
 with sides of 1 foot (0.333... 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....
s, 12 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....
es, or 0.3048 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....
s) in 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....
.

Symbols

There is no universally agreed symbol but the following are used:
  • square feet, square foot, square ft
  • sq feet, sq foot, sq ft, SF
  • feet/-2, foot/-2, ft/-2
  • feet^2, foot^2, ft^2
  • feet², foot², ft²
  • the equation is length times width.


A symbol for square foot, square feet, and "per square foot" commonly used in architecture
Architecture

The term architecture can refer to a process, a profession or documentation.As a process, architecture is the activity of designing and construction buildings and other physical structures by a person or a computer, primarily to provide shelter....
, real estate
Real estate

Real estate is a law term that encompasses land along with anything permanently affixed to the land, such as buildings, specifically property that is fixed in location. and interior space plans is a simple square with a slash through it. It is also occasionally written as a square with a vertical line bisecting it:

1 inch = 2.54 centimetre
Centimetre

A centimetre is a Units of measurement of length in the metric system, equal to one hundredth of a metre, which is the current International System of Units SI base unit of length....
s

1 square meter = 10.764 square feet

Conversions

1 square foot is equivalent to:
  • A block 12 inches by 12 inches has a square foot area of 1 square foot. 12 inches is equal to 1 foot.
  • 144 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:...
    es
  • 1/9 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....
    s
  • 0.01 "squares
    Square (building area)

    The square is an Imperial unit of area that is used in the United States construction industry, and was historically used in Australia. One square is equal to 100 Square foot....
    ". (A square is a unit used in roofing to measure the area of a roof and is also a unit used in Australia
    Australia

    Australia, officially the Commonwealth of Australia, is a country in the southern hemisphere comprising the Australia of the world's smallest continent, the major island of Tasmania, and numerous list of islands of Australia in the Indian Ocean and Pacific Oceans....
     before metrication (and since) to measure the floor area of a house. 1 "square" = 100 sq ft)
  • ˜0.00002295684 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....
    s
  • 92 903.04 square millimetres
  • 929.0304 square centimetres
  • 0.09290304 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....
    s
  • 0.000000092903040 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....
    s


Historical Use

Before metrication
Metrication

Metrication refers to the introduction of the Metric system as the international standard for physical measurements?a long-term series of independent and systematic conversions from the various separate localism systems of historical weights and measures....
, the square foot was in use throughout Europe
Europe

Europe is, conventionally, one of the world's seven continents. Comprising the westernmost peninsula of Eurasia, Europe is generally divided from Asia to its east by the water divide of the Ural Mountains, the Ural , the Caspian Sea, and by the Caucasus Mountains to the southeast....
, as part of the traditional system of measurement
Systems of measurement

A system of measurement is a set of units which can be used to specify anything which can be measured and were historically important, regulated and defined because of trade and internal commerce....
, which showed considerable local variation. Some examples below:
  • Bavaria
    Bavaria

    Bavaria , with an area of and almost 12.5 million inhabitants, is a region located in the southeast of Germany and is the largest States of Germany of Germany by area....
    n square foot = 0.0864751 m²
  • Prussia
    Prussia

    Prussia was, most recently, a historic state originating out of the Duchy of Prussia and the Margraviate of Brandenburg. This state had for centuries substantial influence on Germany and European history....
    n square foot = 0.098504 m²
  • Viennese
    Vienna

    Vienna is the Capital of Republic of Austria and also one of the nine states of Austria. Vienna is Austria's primary city, with a population of about 1.7 million...
     square foot = 0.099921 m²
  • Paris
    Paris

    Paris is the Capital of France and the country's largest city. It is situated on the river Seine, in northern France, at the heart of the ?le-de-France Regions of France ....
    ian square foot = 0.105521 m²


See also

  • 1 E-1 m²
    1 E-1 m²

    Image:Scale one to hundred no labels.svg|110px|right|Click on the small dark green top-left square for quantities smaller than 0.1 square metres, the mid green square for 0.1 to 1 square metres, the light green square for 10 to 100 square metres, and the pale green surround for over 100 square metres...
     for a comparison with other areas
  • 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.|-...
  • Orders of magnitude (area)
    Orders of magnitude (area)

    This page is a progressive and labeled list of the SI area orders of magnitude, with certain examples appended to some list objects....
  • Conversion of units
    Conversion of units

    Conversion of units refers to conversion factors between different units of measurement for the same quantity....
  • Area (geometry)
  • Square (algebra)
    Square (algebra)

    In algebra, the square of a number is that number multiplication by itself. To square a quantity is to multiply it by itself.Its notation is a superscripted "2"; a number x squared is written as x?....
    , square root
    Square root

    In mathematics, a square root of a number x is a number r such that r2 = x, or, in other words, a number r whose square is x....
  • Miscellaneous Technical (Unicode)
    Miscellaneous Technical (Unicode)

    Miscellaneous Technical is a Unicode character block, ranging from 2300 to 23FF, which contains various common symbols which are related to and used in the various technical, programing language and academic professions....
     for a list of miscellaneous technical symbols and fonts which support the square foot symbol