Square miles to acres area units conversion factor is 640. To find out how many acres in square miles, multiply by the factor or instead, use the converter below.
1 Square Mile = 640 Acres
Square mile and acre are imperial and US customary area units and commonly used for land measurements. In many countries, acre (43560 sq feet) is mostly replaced by hectare (10,000 sq meters) which is a metric area unit. Acre is not officially in use anymore in UK since 2010, but still commonly used in united states. The abbreviations are "mi2", "sq mi" and for acre, "ac".
For acre to sq mile conversion, please go to acre to sq mile
For other units of area conversion, please go to Area Conversion