Square Miles to Square Kilometers Converter
Multiply square miles by 2.589988 to get square kilometers.
Formula
1 mi² = 2.5899881103 km²
square kilometers = square miles × 2.5899881103
Worked example
Convert 50 square miles to square kilometers
- Multiply by 2.5899881103
- 50 × 2.5899881103 = 129.499
50 mi² = 129.499 km²
Good to know
A square mile equals 640 acres. A town covering 50 mi² spans about 129.5 km². National parks and counties in the US are usually measured in square miles or acres, while most other countries use km² and hectares.
Conversion table
| Square miles (mi²) | Square kilometers (km²) |
|---|---|
| 1 | 2.58999 |
| 2 | 5.17998 |
| 5 | 12.9499 |
| 10 | 25.8999 |
| 25 | 64.7497 |
| 50 | 129.499 |
| 100 | 258.999 |
| 250 | 647.497 |
| 1,000 | 2,589.99 |
About these units
- Square mile (mi²)
- A square 1 mile on each side: 640 acres, about 2.59 km².
- Square kilometer (km²)
- One million square meters, or 100 hectares.