Free online converter from square miles to square kilometers. Type a value to get an instant result, check the formula and use the quick reference table below.
| square miles (mi²) | square kilometers (km²) |
|---|---|
| 1 | 2.58999 |
| 2 | 5.17998 |
| 5 | 12.9499 |
| 10 | 25.8999 |
| 20 | 51.7998 |
| 50 | 129.499 |
| 100 | 258.999 |
| 250 | 647.497 |
| 500 | 1294.99 |
| 1000 | 2589.99 |
1 mi² = 2.58999 km².
Multiply the value in square miles by 2.58999 to get square kilometers.