Square foot

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

The square foot (PL square feet; abbreviated sq ft, sf, or ft2; also denoted by '2) 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, the United Kingdom, Bangladesh, India, Nepal, Pakistan, Ghana, Liberia, Malaysia, Myanmar, Singapore and Hong Kong.[citation needed] 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[citation needed]. This corresponds to common linguistic usage of foot.

The square foot unit is commonly used in real estate.[1] Dimensions are generally taken with a laser device, the latest in a long line of tools used to gauge the size of apartments[2] 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.[3]

1 Square foot conversion to other units of area:

  • 1 square foot (ft²) = 0.000022956341 acres (ac)
  • 1 square foot (ft²) = 0.000009290304 hectare (ha)
  • 1 square foot (ft²) = 0.09290304 square meters (m²)
  • 1 square foot (ft²) = 144.0000002229 square inches (in²)
  • 1 square foot (ft²) = 0.111111106982 square yards (yd²)
  • 1 square foot (ft²) = 929.0304014422 square centimeters (cm²)
  • 1 square foot (ft²) = 9.290304 square decimeters (dm²)
  • 1 square foot (ft²) = 0.00000009290304 square kilometers (km²)
  • 1 square foot (ft²) = 144003673094580 square microinches (µin²)
  • 1 square foot (ft²) = 92903040000 square micrometers (μm²)
  • 1 square foot (ft²) = 0.0000000358701 square miles (mi²)
  • 1 square foot (ft²) = 92903.04 square millimeters (mm²)

See also[edit]


  1. ^ "How to Find the Square Feet of Your Office Space". SquareFoot Blog. 2020-01-06. Retrieved 2020-01-14.
  2. ^ Santora, Marc (2010-12-17). "The Elusive Measure Known as the Square Foot". The New York Times. ISSN 0362-4331. Retrieved 2020-01-14.
  3. ^ "Square Foot Calculator | How to Measure Square Feet". Home Improvement Tips & Advice from HomeAdvisor. 2016-01-04. Retrieved 2020-01-14.


  1. ^ Square feet to acres converter Square feet conversion to acres and other units of area.