Square Miles to Square Kilometers Converter

Convert sq miles to sq km.

Square Miles → Square Kilometers

Enter a value in Square Miles•1 Square Miles = 2.58999 Square Kilometers

Value

Square Miles

Decimals supported.

Result

Square Kilometers

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Enter a value to convert Square Miles to Square Kilometers.

Square miles are common in the US/UK, while square kilometers are used in metric countries. The relationship is:

To convert Square Miles to Square Kilometers, multiply by 2.58999.

Formula: Square Kilometers = Square Miles × 2.58999

1
Take the number of Square Miles you want to convert (e.g., 10).
2
Multiply that value by 2.58999.
3
The result is the value in Square Kilometers. (Example: 10 × 2.58999 = 25.8999 km²).

Enter square miles and instantly get square kilometers—useful for maps, geography, and land comparisons.

Because it’s squared units, small changes in distance can create large changes in area. Keep that in mind when comparing regions.

Multiply square miles by 2.58999 to get square kilometers.

1 square mile equals 2.58999 square kilometers.

1 km² is about 0.386102 square miles.

2.58999 is a rounded value; many tools round it to 2.59 for simplicity.

10 square miles equals 25.8999 km².