The square foot (; abbreviated sq ft, sf, or ft2; also denoted by ´2 and ⏍) is an imperial unit and U.S. customary unit (non-SI, non-metric) of area, used mainly in the United States, Canada, the United Kingdom, Bangladesh, India, Nepal, Pakistan, Ghana, Liberia, Malaysia, Myanmar, Singapore and Hong Kong. It is defined as the area of a square with sides of 1 foot.

Although the pluralization is regular in the noun form, when used as an adjective, the singular is preferred. So, an apartment measuring 700 square feet could be described as a 700 square-foot apartment. This corresponds to common linguistic usage of foot.

The square foot unit is commonly used in real estate. Dimensions are generally taken with a laser device, the latest in a long line of tools used to gauge the size of apartments or other spaces. Real estate agents often measure straight corner-to-corner, then deduct non-heated spaces, and add heated spaces whose footprints exceed the end-to-end measurement.

Square foot conversion to other units of area:

• square miles (mi2)

• acre (ac)

• square yard (yd2)

• 144 square inches (in2)

• 0.000009290304 hectare (ha)

• 0.0009290304 are (a, uncommon)

• 0.09290304 square meters (m2)

• 9.290304 square decimeters (dm2, uncommon)

• 929.0304 square centimeters (cm2)

• 92,903.04 square millimeters (mm2)

See also

• 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

External links

• Square feet conversion to acres and other units of area

• Square Foot Calculator