Convert Square Miles to Square Kilometers

Use our accurate converter to change square miles into square kilometers. This tool is simple to use and works instantly.

How to Calculate

To change square miles to square kilometers, you just need to know the conversion factor.

Rule: 1 Square Miles = 2.58998811 Square Kilometers

Square Miles to Square Kilometers

Pre-defined calculator for direct square miles to square kilometers conversion.

From

Square Miles (mi²)

To (Result)

Square Kilometers (km²)

Formula: 1 Square = 2.58998811 Square

Definition: A square mile is equal to 640 acres.

History: It is roughly the area of 2.6 square kilometers.

Where it is used: Used to talk about the size of large regions, states, and counties.

Calculation: To convert square miles to square kilometers, multiply the value by the conversion factor (2.58998811).

Example: convert 15 mi2 to km2:
15 mi2 = 15 × 2.58998811 km2 = 38.84982165 km2

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