how many square miles in a square acre
Acres To Square Miles Conversion. For other units of area conversion, please go to Area Conversion. Acres to square miles conversion factor is 0.0015625. To find out how many square miles in acres, multiply by the factor or simply use the converter below. 1 Acre = 0.0015625 Square Miles. Acre is an imperial, US customary systems area unit. Used commonly for measuring the land, in agriculture and forestry. The abbreviation is ac.