Convert Acre to Square Mile
Instant area conversion, with the formula and a full reference table.
1 ac
0.0015625 mi²
1 mi² = 640 ac
How to convert Acre to Square Mile
Multiply the number of acre by 0.0015625.
mi² = ac × 0.0015625
To go the other way, divide instead — or multiply by 640.
Worked example
To convert 25 ac: 25 × 0.0015625 = 0.0390625 mi².
Acre to Square Mile conversion table
| Acre (ac) | Square Mile (mi²) |
|---|---|
| 1 | 0.0015625 |
| 2 | 0.003125 |
| 3 | 0.0046875 |
| 5 | 0.0078125 |
| 10 | 0.015625 |
| 20 | 0.03125 |
| 25 | 0.0390625 |
| 50 | 0.078125 |
| 100 | 0.15625 |
| 250 | 0.390625 |
| 500 | 0.78125 |
| 1,000 | 1.5625 |