Acres to Square Miles
1 Acre = 0.0015625 Square Miles
Common amounts:
About the acre to square mile conversion
The acre (ac) and the square mile (mi²) are both units of area. Convert between area units — square meters, square kilometers, hectares, acres, square feet, square yards and square miles.
To convert acres to square miles, multiply by 0.0015625. To go back, multiply square miles by 640.
Reference table
| Acres | Square Miles |
|---|---|
| 1 ac | 0.0015625 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 |
Need the reverse conversion? Convert Square Miles to Acres.
Convert Acre to other area units
Frequently asked questions
- How many square miles is 1 acre?
- 1 Acre equals 0.0015625 Square Miles. To go the other way, 1 Square Mile equals 640 Acres.
- What's the formula to convert acres to square miles?
- Multiply the number of acres by 0.0015625 to get square miles. For example, 10 acres × 0.0015625 = 0.015625 square miles.
- Does this converter handle decimals and very large numbers?
- Yes. Type any real number, including decimals or values in the trillions. Math runs entirely in your browser — no server round-trip, no sign-up, and nothing to install.