Convert hectare [ha] to acre (US survey) [ac] Online | Free area Converter

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Hectare [ha]


A hectare (ha) is a unit of area commonly used in land measurement. It equals 10,000 square meters or a square that is 100 meters on each side.

1 hectare = 10,000 m² = 0.01 square kilometers.

Hectares are often used to measure fields, farms, and large plots of land.



Acre (US Survey) [ac]


The acre (US survey) is a unit of area used mainly in the United States for land measurement, based on the US survey foot. It is slightly different from the international acre due to the foot definition.



  • 1 US survey acre = 43,560 US survey square feet



  • 1 US survey acre ≈ 4,046.87261 square meters



  • Slightly larger than the international acre by about 0.0005%.



It is commonly used in land surveying, real estate, and agriculture.




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