Square Kilometers to Square Miles
1 Square Kilometer = 0.3861 Square Miles
Common amounts:
About the square kilometer to square mile conversion
The square kilometer (km²) and the square mile (mi²) are both units of area. Convert between area units — square meters, square kilometers, hectares, acres, square feet, square yards and square miles.
To convert square kilometers to square miles, multiply by 0.3861. To go back, multiply square miles by 2.59.
Reference table
| Square Kilometers | Square Miles |
|---|---|
| 1 km² | 0.3861 mi² |
| 5 km² | 1.9305 mi² |
| 10 km² | 3.861 mi² |
| 25 km² | 9.6526 mi² |
| 50 km² | 19.3051 mi² |
| 100 km² | 38.6102 mi² |
Need the reverse conversion? Convert Square Miles to Square Kilometers.
Convert Square Kilometer to other area units
Frequently asked questions
- How many square miles is 1 square kilometer?
- 1 Square Kilometer equals 0.3861 Square Miles. To go the other way, 1 Square Mile equals 2.59 Square Kilometers.
- What's the formula to convert square kilometers to square miles?
- Multiply the number of square kilometers by 0.3861 to get square miles. For example, 10 square kilometers × 0.3861 = 3.861 square miles.
- Does this converter handle decimals and very large numbers?
- Yes. Type any real number, including decimals or values in the trillions. Math runs entirely in your browser — no server round-trip, no sign-up, and nothing to install.