acre
Sign in to saveThe acre ( ) is a unit of land area used in the British imperial and the United States customary systems. It is traditionally defined as the area of one chain by one furlong (66 by 660 feet), which is exactly equal to 10 square chains, of a square mile, 4,840 square yards, or 43,560 square feet, and approximately 4,047 m2, or about 40% of a hectare. The acre is sometimes abbreviated ac, but is usually spelled out as the word "acre".
AI overview
An acre is a unit of land area used in the British and American measurement systems, traditionally defined as a rectangular plot measuring one chain by one furlong (66 by 660 feet), which equals 43,560 square feet or roughly 4,047 square meters. It matters because it's the standard way people in the United States and British Commonwealth countries measure and describe land area for property, farming, and real estate purposes.
AI-generated from the Wikipedia summary — may contain errors.
Key facts
- Unit.name
- acre
- Unit.image
- Acre superimposed over football fields.svg
- Unit.caption
- The area of one acre (red) superposed on an American football field (green) and association football/soccer pitch (blue)
- Unit.standard
- US customary units, Imperial units
- Unit.quantity
- area
- Unit.symbol
- ac
- Unit.symbol2
- acre
- Unit.units1
- SI units
- Unit.inunits1
- =
- Unit.units2
- US customary, Imperial
- Unit.inunits2
- ≡ ≡ sq mi
via Wikipedia infobox
Article
14 sectionsContents
- Description
- US survey acres
- Spanish acre
- Use
- Republic of Ireland
- Indian subcontinent
- United Kingdom
- Equivalence to other units of area
- Historical origin
- Legacy units
- See also
- Notes
- References
- External links
The acre ( ) is a unit of land area used in the British imperial and the United States customary systems. It is traditionally defined as the area of one chain by one furlong (66 by 660 feet), which is exactly equal to 10 square chains, of a square mile, 4,840 square yards, or 43,560 square feet, and approximately 4,047 m2, or about 40% of a hectare. The acre is sometimes abbreviated ac, but is usually spelled out as the word "acre".
Traditionally, in the Middle Ages, an acre was conceived of as the area of land that could be ploughed by one man using a team of eight oxen in one day. The acre is still a statutory measure in the United States, where both the international acre and the US survey acre are in use, but they differ by only four parts per million. The most common use of the acre is to measure tracts of land. The acre is used in many existing and former Commonwealth of Nations countries by custom. In a few, it continues as a statute measure, although not since 2010 in the UK, and not for decades in Australia, New Zealand, and South Africa. In many places where the acre is no longer a statute measure, it is still lawful to use as supplementary information next to the statutory hectare measurement.