Square kilometers (km²) to Square miles (mi²) Conversion
Square kilometers
The square kilometre is a unit of area equal to one million square metres (10⁶ m²) and is the standard unit for expressing the surface areas of countries, cities, lakes, forests, and other large geographic features. Russia, the world's largest country, covers approximately 17.1 million km². The surface area of Earth is approximately 510.1 million km², of which about 70.8% is ocean.
Square miles
The square mile is a unit of area equal to exactly 2,589,988.110336 square metres (approximately 2.59 km²). It is the standard unit for measuring large land areas, population density, and political jurisdictions in the United States and United Kingdom. One square mile contains exactly 640 acres — the basis of the US Public Land Survey System that structured much of North American land division.
| Square kilometers (km²) | Square miles (mi²) |
|---|---|
| 0.1 km² | 0.0386 mi² |
| 1 km² | 0.3861 mi² |
| 2 km² | 0.7722 mi² |
| 3 km² | 1.1583 mi² |
| 5 km² | 1.9305 mi² |
| 10 km² | 3.861 mi² |
| 20 km² | 7.722 mi² |
| 30 km² | 11.5831 mi² |
| 50 km² | 19.3051 mi² |
| 100 km² | 38.6102 mi² |
| 1000 km² | 386.1022 mi² |
Frequently Asked Questions (FAQ)
How many square miles are in 1 square kilometers?
1 square kilometers (km²) is exactly 0.386102 square miles (mi²).
How do I convert square kilometers to square miles?
Multiply the value in square kilometers by 0.386102 to get the result in square miles. Or use the converter above — type any number and see the result instantly.