Acres to Square Miles Calculator
Convert acres to square miles instantly with this acres-to-square-miles calculator. Enter any acreage and get the exact result — or go the other way.
Result0.0015625 mi²1 ac converted
1 ac equals0.0015625 mi²
1 mi² equals640 ac
Acre to square mile reference
| acre | square mile |
|---|---|
| 1 ac | 0.0015625 mi² |
| 2 ac | 0.003125 mi² |
| 5 ac | 0.0078125 mi² |
| 10 ac | 0.015625 mi² |
| 25 ac | 0.039063 mi² |
| 50 ac | 0.078125 mi² |
| 100 ac | 0.15625 mi² |
| 500 ac | 0.78125 mi² |
| 1,000 ac | 1.5625 mi² |
How to convert acre to square mile
One acre equals 0.0015625 mi², so multiply the number of acres by 0.0015625:
mi² = ac × 0.0015625
Going the other way
One square mile equals 640 ac, so to convert back:
ac = mi² × 640
Both directions are shown in the results above, and the drop-downs let you convert between any pair of area units — not just these two.