Hectare
From Freepedia
A hectare (symbol ha) is a metric unit of area. It is not an SI unit, but it is accepted (although discouraged) for use with the SI. The SI unit of area is the square metre.
Contents |
Definition
1 ha = 10 000 m²
Origin
The name is a contraction of the SI prefix hecto + are.
Explanation
The hectare is common in domains such as agriculture, forestry, and town planning in most countries, and in references to those domains in everyday speech. It is rarely used in the United States. In a few other countries that have only partially or recently adopted the metric system (e.g. the United Kingdom) it is only used in technical contexts.
Conversions
One hectare is equivalent to:
Metric
- 100 ares
- 10 000 square metres = 100 metres × 100 metres
- 1 square hectometre (a square with sides 100 metres long)
- 0.01 square kilometres
English units
- 2.471 053 8 international acres
- 2.471 043 9 U.S. survey acres
- 107,639 square feet
- 0.00386 102 square miles (statute)
Other
See also
- 1 E4 m² for further comparisons
External links
- Official SI website: Table 8. Other non-SI units currently accepted for use with the International System Their use is not encouraged.
- Conversion Calculator for Units of AREA
