Non-SI unit accepted for use with SI
|Name||Symbol||Quantity||Value in SI units|
The hectare, symbol ha, is a non-SI unit of area accepted for use with the SI.
Originally one hectare meant 100 ares, where one are was a unit equal to 100 m2. The are is now obsolete, but the hectare remains as a unit accepted for use with the SI.
The hectare is used mostly as a unit to express land areas. There are 100 hectares in one square kilometre.
The non-SI unit hectare, symbol ha, is equal in size to the SI unit square hectometre, symbol hm2.
|1 ha||= 10 000 m2||= 1 hm2|
|100 ha||= 100 hm2||= 1 km2|
Note: SI prefixes must not be used with the hectare.