How to convert acres to square miles?
1 Acre is equal to 0.0015625 square mile. To convert acres to square miles, multiply the acre value by 0.0015625 or divide by 640.
For example, to find out how many square miles in 100 acres, divide 100 by 640, that makes 0.15625 square mile in 100 acres.
acres to square miles formula
mi² = ac * 0.0015625
mi² = ac / 640
1 Acre = 0.0015625 Square Mile
What is an Acre?
Acre is an imperial and United States Customary area unit. 1 ac = 0.0015625 mi2. The symbol is "ac".
You may also use area conversion to convert all area units.