Square Miles to Square Kilometers Converter
CommonSquare meters, acres, hectares and more.
How to convert Square Miles to Square Kilometers
Multiply the square miles value by 2.58999: 1 mi² = 2.58999 km². Going the other way, 1 km² = 0.386102 mi², so divide by 2.58999 or use the Square Kilometers to Square Miles converter.
About these units
Square Miles (mi²)
A square mile is 640 acres, about 2.59 square kilometers. It is used for land areas in the United States.
Square Kilometers (km²)
A square kilometer is one million square meters, about 0.386 square miles or 100 hectares. The areas of cities and countries are given in square kilometers.
Square Miles to Square Kilometers conversion table
| Square Miles (mi²) | Square Kilometers (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 |
| 10 mi² | 25.8999 km² |
| 20 mi² | 51.7998 km² |
| 25 mi² | 64.7497 km² |
| 50 mi² | 129.499 km² |
| 100 mi² | 258.999 km² |
| 500 mi² | 1,294.99 km² |
| 1,000 mi² | 2,589.99 km² |
More square miles conversions
- Square Miles to Square Feet1 mi² = 2.7878e+7 ft²
- Square Miles to Square Inches1 mi² = 4.0145e+9 in²
- Square Miles to Square Yards1 mi² = 3.0976e+6 yd²
- Square Miles to Acres1 mi² = 639.999 ac
- Square Miles to Roods1 mi² = 2,560.01 rd
- Square Miles to Square Meters1 mi² = 2.59e+6 m²
- Square Miles to Dunams1 mi² = 2,589.99 dunam
See every unit on the Area Converter.