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
QHow 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.
QAnd 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.
QWhere 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
Chinese Mu (畝) to m²Convert the Chinese land unit to square metresRoods to square metresConvert the imperial rood to square metresDunams to Square MetersThe land area unit of the Middle East and BalkansPyeong (평) to m²Korean floor-area unitm² to Square FeetProperty area abroadAres (a) to m²Convert ares to square metres
Traditional units (geun, doe, majigi and so on) vary by region and product.