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The **square foot** (plural **square feet**; abbreviated ft^{2} or sq ft) is an imperial unit and U.S. customary unit (non-SI, non-metric) of area, used mainly in the United States, Canada, United Kingdom, Bangladesh, India and Pakistan.^{[citation needed]} It is defined as the area of a square with sides of 1 foot.

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.^{[citation needed]}

1 square foot is equivalent to:

- 144 square inches (Sq In)
- 1/9 square yards (Sq Yd)
- 0.09290304 square metres (symbol: m
^{2})

- 1 E-1 m² for a comparison with other areas
- Area (geometry)
- Conversion of units
- Cubic foot
- Metrication in Canada
- Miscellaneous Technical (Unicode) for a list of miscellaneous technical symbols and fonts which support the
*square foot*symbol - Orders of magnitude (area)
- Square (algebra), square root