Units of measurement
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Acre (ac)
Square mile (mi²)
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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).
Square mile (mi²)
A square mile (mi²) is a large unit of area measurement used to describe large land areas and administrative regions. 1 mi² = 2.59 km².