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Hectare

A hectare (symbol ha) is a metric unit of surface area, equal to 100 ares (the name is a contraction of the SI prefix hecto + are). It is a non-SI unit currently accepted (although discouraged) for use with the SI.

In India, also the abbreviation hac is used.

One hectare is equivalent to:

• 100 ares
• 10 000 square metres
• 1 square hectometre
• 0.01 square kilometres
• 2.471 053 8 international acres
• 2.471 043 9 U.S. survey acres

Conversely:

• 100 hectares is equal to one square kilometre.
• 0.404 685 64 hectares is equal to one international acre
• 0.404 687 26 hectares is equal to one U.S. survey acre

See 1 E4 m² for further comparisons.

See also: Orders of magnitude, conversion of units