Convert square kilometers to square miles
Square kilometer (km²) to square mile (mi²). One square kilometer equals 0.386102 square miles.
Formula
Square kilometer to square mile conversion table
| Square kilometers | Square miles | Square miles | Square kilometers |
|---|---|---|---|
| 1 km² | 0.386102 mi² | 1 mi² | 2.59 km² |
| 2 km² | 0.772204 mi² | 2 mi² | 5.18 km² |
| 3 km² | 1.1583 mi² | 3 mi² | 7.77 km² |
| 5 km² | 1.9305 mi² | 5 mi² | 12.9499 km² |
| 10 km² | 3.861 mi² | 10 mi² | 25.8999 km² |
| 20 km² | 7.722 mi² | 20 mi² | 51.7998 km² |
| 50 km² | 19.3051 mi² | 50 mi² | 129.5 km² |
| 100 km² | 38.6102 mi² | 100 mi² | 259 km² |
| 500 km² | 193.05 mi² | 500 mi² | 1294.99 km² |
| 1000 km² | 386.1 mi² | 1000 mi² | 2589.99 km² |
To convert square kilometers to square miles, divide the number of square kilometers by 2.59. One square kilometer equals 0.386102 square miles, and one square mile equals 2.59 square kilometers, so the relationship is fixed and exact. As a worked example, 10 km² comes to 3.861 mi². Enter your own figure in the converter above to get an instant answer, or use the swap button to flip the direction. This is a area conversion, and like every tool on UnitGlide it runs locally in your browser with no account or upload required. The table further down shows a range of common square kilometer values already worked out in square miles, plus the reverse square mile to square kilometer direction, which is handy for quick reference or double-checking a result by hand.
Frequently asked questions
How many square miles are in a square kilometer?
One square kilometer equals 0.386102 square miles. The ratio is constant, so you can multiply any number of square kilometers by 0.386102 to get square miles.
What is the formula to convert square kilometers to square miles?
Use square miles = square kilometers ÷ 2.59. UnitGlide applies this exact formula for every value, so results stay accurate across the whole range.
How do I convert square miles back to square kilometers?
Go the other way by using one square mile equals 2.59 square kilometers. You can also press the swap button in the converter above to flip the direction in one click.
Is this square kilometer to square mile converter accurate?
Yes. It uses internationally defined SI conversion factors, as maintained by the BIPM, and all math runs in your browser so nothing is rounded away on a server. For everyday use the displayed precision is more than enough.