Comparison of Area units
| Unit
| SI
| SI base |
| 1 ca
| 1 m²
| 1 m² |
| 1 a
| 1 dam²
| 102 m² |
| 1 ha
| 1 hm²
| 104 m² |
| 100 ha
| 1 km²
| 106 m² |
| non-SI comparisons
|
| non-SI
| metric
| SI base |
| 0.00386102 sq mi
| 1 ha
| 104 m² |
| 2.471 acre
| 1 ha
| 104 m² |
| 107,639 sq ft
| 1 ha
| 104 m² |
|
A
hectare (symbol
ha, ) is a unit of area equal to , or one square
hectometre (0.01 kilometer, or 100 meters squared), and commonly used for
measuring land area. A square 100
m on each side is one
ha, the most common and convenient
SI area multiple used in the
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. Square kilometers are often too large to work with conveniently, and square meters are similarly too small.
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.
Explanation
The hectare is commonly used in most countries around the world, especially in domains concerned with land planning and management such as
agriculture,
forestry, and
town planning. The few countries that still use the imperial system (i.e.
United States,
Myanmar, and to some extent in
Canada) have a different unit of area, which is called
acre, equal to 43,560 square feet or 33 feet x 1/4 mile, equivalent to .404695 ha.
Conversions
One hectare is equivalent to:
Metric
Imperial units
Other
- 15 mǔ (Chinese)
- 0.15 qǐng
- 10 dunam or dönüm (Middle East)
- 10 stremmata (Greece)
- 6.25 rai (Thai)
- ≈ 1.008 chō (Japanese)
- 7.47 bigha (Bangladesh, India, Nepal)
See also
External links
