Square foot

Comparison of 1 Square foot with some Imperial and metric units of area

The square foot (plural square feet; abbreviated ft² or sq ft) is an imperial unit and U.S. customary unit (non-SI, non-metric) of area, used mainly in the United States and partially in Canada, United Kingdom, Ghana, Hong Kong, Bangladesh, India and Pakistan. 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.

To calculate the Square footing of an area, multiply the length of one side of a regular quadrilateral multiplied by the length of an adjacent side (for example, a rectangle of 0.5 foot by 2 foot would cover 1 square foot).

Conversions

1 square foot is equivalent to:

• 144 square inches (Sq In)
• 1/9 square yards (Sq Yd)
• 0.09290304 square metres (symbol: m²)

See also

• 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

References