Square foot

From Wikipedia, the free encyclopedia

For other uses, see Square.

The square foot is an Imperial unit / U.S. customary unit (non-SI non-metric) of area, used in the United States, United Kingdom and elsewhere. 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.

[edit] 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 Height.

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.

[edit] Conversions

1 square foot is equivalent to:

A block 12 inches by 12 inches has a square foot area of 1 square foot.
144 square inches
≈0.111 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