Acres to hectares (ac to ha) area units conversion factor is 0.404685642. To find out how many hectares in an acre, multiply the acre value by the conversion factor or use the converter.
1 Acre = 0.404685642 Hectares
There are 0.404685642 hectares in an acre, because an acre is defined as the area of 1 chain (66 ft) by 1 furlong (660 ft), that makes 66 ft * 660 ft = 43 560 sq. feet (or 4046.8564 sq. meters). Hectare is defined as the area of 100 ares (100 sq. meters), that makes 100 * 100 = 10 000 sq meters. If you divide the number of sq. meters in an acre by the number of sq. meters in a hectare, that makes 4046.8564 / 10000 = 0.404685642 hectares in an acre.
For example, to find out how many hectares there are in an acre and a half, multiply the acre value by the conversion factor, that makes 1.5 acres * 0.404685642 = 0.6 hectares in an acre and a half.
Acre is an imperial (UK) and US customary area measurement unit. An acre equals to 43560 square feet, 4840 sq. yards or 4046.8564 sq. meters. An acre is about 40 percent of a hectare. The abbreviation is "ac".
Hectare is a metric system area unit and mostly used for land measurement, agriculture and forestry. One hectare equals to 10,000 square meters (an area of a square with all sides are 100 meters). The abbreviation for hectare is "ha".
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