How do I convert square miles to square kilometers?

Multiply the number of square miles by 2.58998811. For example, 5 mi² = 12.9499 km².

How many square kilometers are in one square mile?

One square mile equals 2.58998811 square kilometers.

12 square miles equals 31.0799 square kilometers.

Use the reverse Square kilometers to Square miles converter: multiply square kilometers by 0.3861021585.

To convert square miles to square kilometers, use this formula:

km² = mi² × 2.58998811 (or divide by 0.3861021585)

A square mile is the area of a square 1 mile on each side, 640 acres or about 2.59 km².

A square kilometer is 1,000,000 square meters, or 100 hectares. It is used for the area of cities, lakes and countries.

How do I convert square miles to square kilometers?: Multiply the number of square miles by 2.58998811. For example, 5 mi² = 12.9499 km².
How many square kilometers are in one square mile?: One square mile equals 2.58998811 square kilometers.
What is 12 mi² in square kilometers?: 12 square miles equals 31.0799 square kilometers.
How do I convert square kilometers back to square miles?: Use the reverse Square kilometers to Square miles converter: multiply square kilometers by 0.3861021585.

Need other units? Use the full area converter.