The hectare conversion selector above selects the area/surface measurement unit to convert to starting from hectares (ha). To make a conversion starting from a unit of area other than hectare, simply click on the "Reset" button.
The hectare is a unit of area in the metric system equal to 10,000 square meters (1 ha = 10,000 m2), the standard derived unit of area in the International System of Units (SI).
The hectare (ha) is also equal to 100 ares (a) or 10,000 centiares (ca) (units of area in the metric system), or 0.01 square kilometers (km2) (a unit of area in the SI), or 2.47104393 US survey acres (ac) (a US customary unit of area), or 11,959.9005 square yards (sq yd), or 0.0038610215 square miles (sq mi) or 2.47105381 acres (ac), which are Imperial / US customary units of area.
One hectare (ha) is equal to one square hectometre (hm2) (or square hectometer, US spelling), the equivalent unit of area in the SI.
The hectare is widely used in many countries in the world as a unit of area in real estate, forestry, agriculture, and town planning.