Convert square kilometers to square miles
1 km² = 0.386102158542 mi² — exactly. Both units are defined against the SI, so this factor is a fraction, not an approximation.
0.386 102 158 542mi²
As a fraction: 244140625/632321316
1 km² = 0.386102158542 mi²
How to convert square kilometers to square miles
Multiply the number of square kilometers by 0.386102158542 to get square miles.
Square kilometer to Square mile conversion table
| Square kilometers (km²) | Square miles (mi²) |
|---|---|
| 1 km² | 0.386 102 16 |
| 2 km² | 0.772 204 32 |
| 3 km² | 1.158 306 5 |
| 5 km² | 1.930 510 8 |
| 10 km² | 3.861 021 6 |
| 20 km² | 7.722 043 2 |
| 25 km² | 9.652 554 |
| 50 km² | 19.305 108 |
| 100 km² | 38.610 216 |
| 250 km² | 96.525 54 |
| 500 km² | 193.051 08 |
| 1000 km² | 386.102 16 |
Square mile to Square kilometer conversion table
| Square miles (mi²) | Square kilometers (km²) |
|---|---|
| 1 mi² | 2.589 988 1 |
| 2 mi² | 5.179 976 2 |
| 3 mi² | 7.769 964 3 |
| 5 mi² | 12.949 941 |
| 10 mi² | 25.899 881 |
| 20 mi² | 51.799 762 |
| 25 mi² | 64.749 703 |
| 50 mi² | 129.499 41 |
| 100 mi² | 258.998 81 |
| 250 mi² | 647.497 03 |
| 500 mi² | 1294.9941 |
| 1000 mi² | 2589.9881 |
Frequently asked
How many square miles are in a square kilometer?
One square kilometer equals 0.3861021585 square miles (km² → mi²). That figure is exact, not rounded.
How do you convert square kilometers to square miles?
Multiply the number of square kilometers by 0.386102158542 to get square miles.
What is 1 mi² in square kilometers?
One square mile is 2.58998811 square kilometers.
What is 10 km² in mi²?
10 km² = 3.861 021 6 mi².