The square foot (; abbreviated sq ft, sf, or ft<sup>2</sup>; also denoted by ´<sup><sup>2</sup></sup> 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 (mi<sup>2</sup>)
- ≈ acre (ac)
- ≈ square yard (yd<sup>2</sup>)
- 144 square inches (in<sup>2</sup>)
- 0.000009290304 hectare (ha)
- 0.0009290304 are (a, uncommon)
- 0.09290304 square meters (m<sup>2</sup>)
- 9.290304 square decimeters (dm<sup>2</sup>, uncommon)
- 929.0304 square centimeters (cm<sup>2</sup>)
- 92,903.04 square millimeters (mm<sup>2</sup>)
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