Acres to square miles
Convert acres (ac) to square miles (mi²) instantly. 1 acre = 0.0015625 square miles.
Quick answer: 1 acre equals 0.0015625 mi². To convert acres to square miles, multiply the value by 0.0015625.
Good to know
- 1 hectare is 10,000 square metres, and 1 acre is about 4,047 square metres.
- One hectare is about 2.47 acres.
Quick reference
| ac | mi² |
|---|---|
| 1 | 0.0015625 |
| 2 | 0.003125 |
| 5 | 0.0078125 |
| 10 | 0.015625 |
| 25 | 0.0390625 |
| 50 | 0.078125 |
| 100 | 0.15625 |
Frequently asked questions
How many square miles are in 1 acre?
There are 0.0015625 square miles in 1 acre.
How do I convert acres to square miles?
Multiply the number of acres by 0.0015625.
How do I convert square miles back to acres?
Divide by 0.0015625, or multiply by 640.
Related tools
Acres to Square meters ConverterAcres to Square kilometers ConverterAcres to Square foots ConverterAcres to Square yards ConverterAcres to Hectares ConverterSquare meters to Square kilometers ConverterSquare meters to Square foots ConverterSquare meters to Square yards Converter
Need something custom?
Can't find the calculator or tool you need? Tell us what you're after and we'll build it for you. It takes about two minutes to fill in.
Start the Project Brief