Convert Acres to Square Miles
One acre equals 0.001563 square miles. Type any value to convert acres to square miles instantly — with a full reference table below.
Convert Acres to Square Miles
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Conversion formula
To convert acres to square miles, multiply by 0.001563. One acre equals 0.001563 mi², and one square mile equals 640 ac.
Acres to Square Miles table
About converting Acres to Square Miles
Acres (ac) and Square Miles (mi²) are both units of area. The exact factor is 1 ac = 0.001563 mi², so multiply by 0.001563 to go from acres to square miles (or divide to go back).
The conversion is exact and runs entirely in your browser. Need the reverse? Use the Square Miles to Acres converter, or the full unit converter for every unit at once.
Frequently asked questions
How many square miles are in one acre?
One acre equals 0.001563 square miles.
How do I convert acres to square miles?
Multiply the number of acres by 0.001563. For example, 10 acres = 0.015625 square miles.
What is 5 acres in square miles?
5 acres is 0.007812 square miles.