Square foot

Square foot

The square foot is an imperial unit / U.S. customary unit (non-SI non-metric) 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 (0.333... yards, 12 inches, or 0.3048 metres) 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:

1 inch = 2.54 centimetres

1 square metre = 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 inches
* 1/9 square yards
* 0.01 "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 acres
* 92 903.04 square millimetres
* 929.0304 square centimetres
* 0.09290304 square metres
* 0.000000092903040 square kilometres

Historical Use

Before metrication, the square foot was in use throughout Europe, as part of the traditional system of measurement, which showed considerable local variation. Some examples below:
* Bavarian square foot = 0.0864751 m²
* Prussian square foot = 0.098504 m²
* Viennese square foot = 0.099921 m²
* Parisian square foot = 0.105521 m² ["Das Hauslexikon", vol. VI, Leipzig: Breitkopf und Härtel 1837, p. 596]

References

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
* Miscellaneous Technical (Unicode) for a list of miscellaneous technical symbols and fonts which support the "square foot" symbol


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Look at other dictionaries:

  • Square foot — Foot Foot (f[oo^]t), n.; pl. {Feet} (f[=e]t). [OE. fot, foot, pl. fet, feet. AS. f[=o]t, pl. f[=e]t; akin to D. voet, OHG. fuoz, G. fuss, Icel. f[=o]tr, Sw. fot, Dan. fod, Goth. f[=o]tus, L. pes, Gr. poy s, Skr. p[=a]d, Icel. fet step, pace… …   The Collaborative International Dictionary of English

  • Square foot — Square Square (skw[^a]r), a. 1. (Geom.) Having four equal sides and four right angles; as, a square figure. [1913 Webster] 2. Forming a right angle; as, a square corner. [1913 Webster] 3. Having a shape broad for the height, with rectilineal and… …   The Collaborative International Dictionary of English

  • square foot — noun a unit of area equal to one foot by one foot square • Syn: ↑sq ft • Hypernyms: ↑area unit, ↑square measure * * * noun : a unit of area equal to a square one foot long on each side see measure table * * * a unit of area measurement equal to a …   Useful english dictionary

  • Square foot — Der Quadratfuß (square foot, Plural square feet) ist ein Flächenmaß im angloamerikanischem Maßsystem, das in den USA und im Vereinigten Königreich benutzt wird. Ein Quadratfuß ist definiert als eine quadratische Fläche mit einer Kantenlänge von 1 …   Deutsch Wikipedia

  • square foot — a unit of area measurement equal to a square measuring one foot on each side; 0.0929 square meters. Abbr.: ft2, sq. ft. * * * …   Universalium

  • square foot — noun A unit of area (abbreviation sq ft or sq. ft. or ft) equal to the area of a square the sides of which are each one foot long …   Wiktionary

  • square foot — (ft2 or sq ft)    a traditional unit of area. 1 ft2 equals 144 in2 or exactly 929.0304 cm2 (0.092 903 04 m2) …   Dictionary of units of measurement

  • Square foot gardening — An updated book published by Mel Bartholomew in February 2006. Square Foot Gardening is the practice of planning small but intensively planted gardens. The phrase square foot gardening was popularized by Mel Bartholomew in a 1981 Rodale Press… …   Wikipedia

  • Pound per square foot — Pounds force per square foot oder auch nur pound per square foot ( Pfund pro Quadratfuß ) ist eine imperiale Maßeinheit des Drucks in einer Reihe von Staaten, die das angloamerikanische Maßsystem nutzten bzw. noch nutzen. Einheitenzeichen:… …   Deutsch Wikipedia

  • Pounds-force per square foot — oder auch nur pound per square foot ( Pfund pro Quadratfuß ) ist eine imperiale Maßeinheit des Drucks in einer Reihe von Staaten, die das angloamerikanische Maßsystem nutzten bzw. noch nutzen. Einheitenzeichen: lb.p.sq.ft., lb./sq.ft. 1… …   Deutsch Wikipedia

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