Convert square miles to square kilometers quickly and accurately using this free online converter
Used for land area, room size, and real estate measurements.
💡 Square meters are standard internationally; square feet are used in the US.
km² = mi² × 2.59
Example: 1 mi² × 2.59 = 2.59 km²
Use square meters internationally; square feet for US properties.
Common uses: real estate, land measurement, and floor plans.
How do I convert mi² to km²?
Multiply the value in Square Miles by 2.59. For example: 10 mi² = 25.8999 km².
When should I use Square kilometers instead of Square Miles?
Use square meters internationally; square feet for US properties.
Is this converter accurate?
Yes. We use internationally recognized conversion factors, updated to current standards.
| Square Miles (mi²) | Square kilometers (km²) |
|---|---|
| 1 mi² | 2.59 km² |
| 5 mi² | 12.9499 km² |
| 10 mi² | 25.8999 km² |
| 25 mi² | 64.7497 km² |
| 50 mi² | 129.4994 km² |
| 100 mi² | 258.9988 km² |
| 500 mi² | 1294.9941 km² |
| 1000 mi² | 2589.9881 km² |