Square foot
699235
225545196
2008-07-14T06:38:09Z
71.42.216.139
/* Symbols */
{{otheruses3|Square (disambiguation)}}
The '''square foot''' is an [[imperial unit]] / [[U.S. customary unit]] (non-[[SI]] non-[[metric system|metric]]) of [[area]], used mainly in the [[United States]] and [[United Kingdom]]. It is defined as the area of a [[Square (geometry)|square]] with sides of 1 [[foot (unit of length)|foot]] (0.333... [[yard]]s, 12 [[inch]]es, or 0.3048 [[metre]]s) in [[length]].
== 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]], [[real estate]] 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:
⏍<ref>For a list of miscellaneous technical symbols and fonts which support them, see the article [[Miscellaneous Technical (Unicode)]]</ref>
1 inch = 2.54 [[centimetre]]s
1 [[square metre]] = 10.764 square feet''''Italic text''<nowiki>Insert non-formatted text here</nowiki>
== 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]]es
* 1/9 [[square yard]]s
* 0.01 "[[Square (building area)|squares]]". (A square is a unit used in [[Australia]] before metrication (and since) to measure the floor area of a house. 1 "square" = 100 sq ft)
* ≈0.00002295684 [[acre]]s
* 92 903.04 [[square millimetre]]s
* 929.0304 [[square centimetre]]s
* 0.09290304 [[square metre]]s
* 0.000000092903040 [[square kilometre]]s
== Historical Use ==
Before [[metrication]], the square foot was in use throughout [[Europe]], as part of the traditional [[systems of measurement|system of measurement]], which showed considerable local variation. Some examples below:
* [[Bavaria]]n square foot = 0.0864751 m²
* [[Prussia]]n square foot = 0.098504 m²
* [[Vienna|Viennese]] square foot = 0.099921 m²
* [[Paris]]ian square foot = 0.105521 m² <ref>''Das Hauslexikon'', vol. VI, Leipzig: Breitkopf und Härtel [[1837]], p. 596</ref>
==References==
{{reflist}}
== See also ==
* [[1 E-1 m²]] for a comparison with other areas
* [[Cubic foot]]
* [[Orders of magnitude (area)]]
* [[Conversion of units]]
* [[Area (geometry)]]
* [[Square (algebra)]], [[square root]]
[[Category:Units of area]]
[[Category:Imperial units]]
[[Category:Customary units in the United States]]
[[ast:Pie cuadráu]]
[[bg:Квадратен фут]]
[[de:Quadratfuß]]
[[es:Pie cuadrado]]
[[gl:Pé cadrado]]
[[hu:Négyzetláb]]
[[ja:フィート#.E5.B9.B3.E6.96.B9.E3.83.95.E3.82.A3.E3.83.BC.E3.83.88]]
[[no:Kvadratfot]]
[[pt:Pé quadrado]]
[[vi:Ft²]]
[[zh:平方英尺]]