acre to square mile
Live acre (ac) to square mile (mi²) converter. Plus a 10-value reference table and FAQs.
Conversion table
Ten sample values from acre to square mile. Use the converter above for arbitrary values.
| acre (ac) | → | square mile (mi²) |
|---|---|---|
| 0.001 ac | → | 1.5625e-6 mi² |
| 0.01 ac | → | 1.5625e-5 mi² |
| 0.1 ac | → | 0.000156 mi² |
| 0.5 ac | → | 0.000781 mi² |
| 1 ac | → | 0.001563 mi² |
| 2 ac | → | 0.003125 mi² |
| 5 ac | → | 0.007813 mi² |
| 10 ac | → | 0.015625 mi² |
| 100 ac | → | 0.15625 mi² |
| 1,000 ac | → | 1.5625 mi² |
About the acre
4,047 m². US farmland and lot size.
About the square mile
640 acres. US county/area units.
How acre to square mile conversion works
Both units belong to Area. Unitbox first expresses the input in the category reference unit (m²), then expresses that same quantity in square mile.
The right unit depends on the convention used by your industry, country, instrument, or source document.
Unit definitions and conversion factors are maintained in the Unitbox methodology. Last reviewed with the current conversion dataset.
Frequently asked questions
Frequently Asked Questions
How do I convert acre to square mile?
Multiply the acre value by 0.001563 to get it in square mile. For example, 10 ac = 0.0156 mi².
What is 1 ac in mi²?
1 ac = 0.001563 mi².
What is 100 ac in mi²?
100 ac = 0.1563 mi².
What is the formula?
Linear: multiply by 0.001563 (the unit factor ratio).
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