Convert acres to square miles
1 ac = 0.0015625 mi². Change the amount below, or read the formula and the reference table further down.
1 acre equals
square miles
1 ac = 0.0015625 mi²
The formula
Acres and square miles both measure area from the same zero, so a single multiplier does the job.
mi² = ac × 0.0015625
Going the other way? Convert square miles to acres.
Acres to square miles table
Common values, rounded for reading.
| Acres (ac) | Square miles (mi²) |
|---|---|
| 1 | 0.001563 |
| 2 | 0.003125 |
| 3 | 0.004688 |
| 4 | 0.00625 |
| 5 | 0.007813 |
| 6 | 0.009375 |
| 7 | 0.010938 |
| 8 | 0.0125 |
| 9 | 0.014063 |
| 10 | 0.015625 |
| 15 | 0.023438 |
| 20 | 0.03125 |
| 25 | 0.039063 |
| 30 | 0.046875 |
| 40 | 0.0625 |
| 50 | 0.078125 |
| 75 | 0.117188 |
| 100 | 0.15625 |
| 250 | 0.390625 |
| 500 | 0.78125 |
| 1,000 | 1.5625 |
Questions people ask
- How many square miles are in a acre?
- One acre equals 0.0015625 square miles.
- How do I convert acres to square miles by hand?
- Multiply the number of acres by 0.0015625. For a rough check, 0.002 is close enough for most everyday use.
- What is 1 acre in square miles?
- 1 acre is 0.0015625 square miles.
Calcuit generates this page from a unit table, so the factors here match every other page on the site.