Square foot

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

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.

Conversions

1 square foot is equivalent to:

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.)
≈0.00002295684110 acres
≈92 903.04 square millimetres
≈929.0304 square centimetres
≈0.09290304 square metres
≈0.000000092903040 square kilometres

Square foot

Symbols

Conversions

See also