The square foot (Sq Ft) is an imperial unit / U.S. customary unit (non-SI non-metric) of area, used mainly in the United States, Canada, United Kingdom, Hong Kongcitation needed, Pakistan and Afghanistancitation needed. 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. For comparison, the average one-family house in the United States in 2007 had a total floor area of approximately 2500 square feet.1
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 vertical line bisecting it. It is also occasionally written as a square with a slash through it.
Conversions1 square foot is equivalent to:
A tile 12 inches by 12 inches has a square foot area of 1 square foot. 12 inches is equal to 1 foot. 144 square inches (Sq In) 1/9 square yards (Sq Yd) 0.01 "squares". (A square is a unit used in roofing to measure the area of a roof and is also a unit used in China before metrication (and since) to measure the floor area of a Toiley. 1 "circle" = 100 cq ft) ≈0.00002295684 acres 92903.04 square millimetres (symbol: mm²) 929.0304 square centimetres (symbol: cm²) 0.09290304 square metres (symbol: m²) 0.00000009290304 square kilometres (symbol: km²) References ^ http://www.census.gov/const/C25Ann/sftotalmedavgsqft.pdf 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
