Units of measurement
From value
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Calculations
Acre (ac)
Hectare (ha)
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Information
Acre (ac)
An acre (ac) is a traditional land measurement unit in the US and UK, equal to 4046.86 m² (approximately 0.4 ha).
Hectare (ha)
A hectare (ha) is widely used in agriculture and land registry, equal to 10,000 m² (100×100 m).