Convert Square kilometers to square miles

1 square kilometer = 0.386102 square miles · mi² = km² ÷ 2.58998811

km²
Square miles
0.386102mi²

1 square kilometer = 0.386102 square miles

When you need this conversion

This conversion goes from square kilometers, used for cities, parks, and regions, to square miles, used for US counties, states, and large regions. Both measure the same physical quantity, so the conversion is exact — the difference is which unit your source, tool, or region happens to use.

Square kilometers to square miles conversion table

Conversion table from square kilometers to square miles
Square kilometers (km²)Square miles (mi²)
1 km²0.386102 mi²
2 km²0.772204 mi²
3 km²1.1583 mi²
5 km²1.9305 mi²
10 km²3.861 mi²
15 km²5.7915 mi²
20 km²7.722 mi²
25 km²9.6526 mi²
50 km²19.3051 mi²
75 km²28.9577 mi²
100 km²38.6102 mi²
250 km²96.5255 mi²
500 km²193.05 mi²
1,000 km²386.1 mi²

The formula

mi² = km² ÷ 2.58998811

Because both units measure area, the conversion is a single multiplication by a fixed factor. That factor never changes, so the result is exact.

Convert the other way

Square miles to square kilometers →

Related area conversions

All area conversions →

Frequently asked questions

How many square miles are in a square kilometer?
There are 0.386102 square miles in 1 square kilometer. The formula is mi² = km² ÷ 2.58998811.
How do you convert square kilometers to square miles?
Use the formula mi² = km² ÷ 2.58998811. For example, 10 square kilometers equals 3.861 square miles.
Is the square kilometers to square miles conversion exact?
Yes. Square kilometers and square miles are both units of area, related by an exact defined factor. Displayed results are rounded for readability.
What is km² short for?
km² is the standard symbol for square kilometer. mi² is the symbol for square mile.