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Hectare
A '''hectare''' (symbol '''ha''', ) is a unit of area equal to , or one square hectometre (100 metres, squared), and commonly used for surveying|measuring land area. A square 100 metres on each side is one '''hectare''', the most common and convenient SI area multiple used in the surveying|surveying profession for day to day legal documents such as land deeds, mortgage surveys, town planning, environmental protection, and other necessary property considerations under the law.
Its base unit, the are, was defined by older forms of the metric system, but is no longer part of the modern metric system. The Comité International des Poids et Mesures classifies the hectare as a unit that is accepted for use with SI.[ Chapter 5.]
Explanation
The hectare is used in most countries around the world, especially in domains concerned with land planning and management such as agriculture, forestry, and town planning. The United States, Myanmar, and to some extent Canada use the Imperial measurement acre, equal to 43,560 square feet, or 33 feet x 1/4 mile, which is 0.404686 ha.
ConversionsOne hectare is equivalent to:
Metric
- 10,000 square metres
- 0.01 square kilometre
- 1 square hectometre = 100 metres × 100 metres (a square with sides 100 metres long)
- 10 decares
- 100 ares
- 10,000 centiares
Imperial units
- 2.4710538 acre|international acres
- 2.4710439 acre|U.S. survey acres
- 107,639 square foot|square feet
- 0.00386102 square miles (statute mile|statute)
Other
- 15 Chinese units of measurement#Area|mǔ (Chinese)
- 0.15 Chinese units of measurement#Area|qǐng
- 10 dunam or dönüm (Middle East)
- 10 stremmata (Greece)
- 6.25 rai (unit)|rai (Thai)
- ≈ 1.008 Japanese units of measurement#Area|chō (Japanese)
- 7.47 bigha (Bangladesh, India, Nepal)
See also
- 1 E+4 m² for further comparisons
- Acre
- conversion of units
- Hecto|hecto-
- Hectometre
- Orders of magnitude
References
External links
- Official SI website: Table 6. Non-SI units accepted for use with the International System of Units
Category:Units of area
Category:Non-SI metric units
be-x-old:Гектар
nds-nl:Bunder
simple:Hectare
bat-smg:Hektars
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