Convert square kilometres to square miles
Enter a value in square kilometres (km²) to get square miles (mi²). One square kilometre is 0.386102 square miles; one square mile is 2.59 square kilometres.
How to use the Square kilometre to square mile
- Type the number of square kilometres.
- Click Convert.
- Read the result in square miles, plus the same value in every other area unit.
km² to mi² formula
square miles = square kilometres × 0.386102. To go the other way, square kilometres = square miles × 2.59 (see square miles to square kilometres).
Worked example
12 km² × 0.386102 = 4.6332 mi².
Square kilometres to square miles conversion table
| Square kilometres | Square miles |
|---|---|
| 0.1 km² | 0.03861 mi² |
| 0.5 km² | 0.193051 mi² |
| 1 km² | 0.386102 mi² |
| 2 km² | 0.772204 mi² |
| 3 km² | 1.1583 mi² |
| 5 km² | 1.9305 mi² |
| 10 km² | 3.861 mi² |
| 20 km² | 7.722 mi² |
| 25 km² | 9.6526 mi² |
| 50 km² | 19.3051 mi² |
| 100 km² | 38.6102 mi² |
| 250 km² | 96.5255 mi² |
| 500 km² | 193.0511 mi² |
| 1,000 km² | 386.1022 mi² |
About the square kilometre
One million square metres, or 100 hectares. Cities and countries.
About the square mile
640 acres, about 2.59 km². Counties and cities in the USA.
Related conversions
Frequently asked questions
How many square miles in a square kilometre?
0.386102 square miles.
How many square kilometres in a square mile?
2.59 square kilometres.
Is the factor exact?
The factor 0.386102 is derived from the units' exact definitions; only the display is rounded.
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Last updated 2026-09-23.