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Convert square miles to square kilometers

Convert square miles (mi²) to square kilometers (km²). 1 mi² = 2.58999 km², and 1 km² = 0.386102 mi².

1 mi² = 2.58999 km²

Square Miles to Square KM formula

km² = mi² × 2.58998811

Multiply the number of square miles by 2.58998811.

Example: To convert 1 mi² to square kilometers: 1 × 2.58998811 = 2.58999 km².

Quick answers

What is 1 mi² in square kilometers?
1 mi² = 2.58999 km²
What is 10 mi² in square kilometers?
10 mi² = 25.8999 km²

Square Miles to Square KM conversion table

Square KM to Square Miles table
square miles (mi²)square kilometers (km²)
1 mi²2.58999 km²
2 mi²5.17998 km²
5 mi²12.9499 km²
10 mi²25.8999 km²
50 mi²129.499 km²
100 mi²258.999 km²
1,000 mi²2,589.99 km²
10,000 mi²25,899.9 km²

Frequently asked questions

How many square kilometers are in a square mile?

There are 2.58999 square kilometers in a square mile (1 mi² = 2.58999 km²).

How do I convert square miles to square kilometers?

Multiply the number of square miles by 2.58998811. To convert 1 mi² to square kilometers: 1 × 2.58998811 = 2.58999 km².

Is the Square Miles to Square KM conversion exact?

Yes. Both units are defined exactly, so 1 square mile is exactly 2.58998811034 square kilometers. Results on this page are rounded to six significant digits; pick more decimals in the converter if you need them.

What is 1 mi² in square kilometers?

1 mi² = 2.58999 km².

How do I convert square kilometers back to square miles?

Use the reverse relationship: 1 km² = 0.386102 mi². The Square KM to Square Miles page has a converter and a full table.

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