Square Miles to km²
A square mile is 2.59 km². US state and county areas and wildfire coverage are reported in it; converting makes the size legible.
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Common values
Formula
㎢ = sq mi × 2.589988110336
Lengths scale by 1.609 but areas by 2.59. Applying the length ratio to an area understates it by sixty per cent.
Frequently asked questions
Q. How many ㎢ is 1 sq mi?
1 sq mi is 2.59 ㎢, and 10 sq mi is 25.8999 ㎢. Type any value in the box above to convert instantly.
Q. And how many sq mi is 1 ㎢?
1 ㎢ is 0.3861 sq mi. This converter works both ways, so typing in the right box updates the left one.
Q. Where is this unit used?
Lengths scale by 1.609 but areas by 2.59. Applying the length ratio to an area understates it by sixty per cent.
Other converters
Traditional units (geun, doe, majigi and so on) vary by region and product.