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Square miles to Square kilometers
Type a value in either box. 1 mi² = 2.58999 km².
How to convert square miles to square kilometers
1 mi² = 2.58998811 km², and 1 km² = 0.3861021585 mi². To convert square miles to square kilometers, use:
km² = mi² × 2.58998811
Example: convert 10 mi² to square kilometers: 10 × 2.58998811 = 25.899881, so 10 mi² = 25.8999 km².
Good to know
Multiply by 2.59. One square mile is also 640 acres.
Square miles to Square kilometers chart
| Square miles (mi²) | Square kilometers (km²) |
|---|---|
| 0.1 mi² | 0.258999 km² |
| 0.25 mi² | 0.647497 km² |
| 0.5 mi² | 1.29499 km² |
| 1 mi² | 2.58999 km² |
| 2 mi² | 5.17998 km² |
| 3 mi² | 7.76996 km² |
| 4 mi² | 10.36 km² |
| 5 mi² | 12.9499 km² |
| 6 mi² | 15.5399 km² |
| 7 mi² | 18.1299 km² |
| 8 mi² | 20.7199 km² |
| 9 mi² | 23.3099 km² |
| 10 mi² | 25.8999 km² |
| 12 mi² | 31.0799 km² |
| 15 mi² | 38.8498 km² |
| 20 mi² | 51.7998 km² |
| 25 mi² | 64.7497 km² |
| 30 mi² | 77.6996 km² |
| 40 mi² | 103.6 km² |
| 50 mi² | 129.499 km² |
| 75 mi² | 194.249 km² |
| 100 mi² | 258.999 km² |
| 250 mi² | 647.497 km² |
| 500 mi² | 1,294.99 km² |
| 1,000 mi² | 2,589.99 km² |
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