Area
square miles to km² Converter
1 mi² = 2.59 km². Enter any value and the result updates instantly.
Convert
How to convert square miles to km²
- Type the square miles value in the calculator.
- Keep square miles selected as the from unit and km² selected as the to unit.
- Use the instant result, or copy it with the copy button.
square miles to km² chart
| square miles | km² |
|---|---|
| 1 mi² | 2.59 km² |
| 2 mi² | 5.18 km² |
| 5 mi² | 12.9499 km² |
| 10 mi² | 25.8999 km² |
| 25 mi² | 64.7497 km² |
| 50 mi² | 129.5 km² |
| 100 mi² | 259 km² |
Formula
km² = mi² x 2.589988110336
Example: 1 mi² = 2.59 km².
Source
Area units derived from exact length definitions; acre and hectare factors are fixed.
Common questions
How do I convert square miles to km²?
Enter the square miles value in the converter, or multiply by the factor shown in the formula. 1 mi² = 2.59 km².
What is 1 mi² = 2.59 km²?
1 mi² = 2.59 km². The chart on this page gives more common square miles to km² values.
Where does this area conversion come from?
Area units derived from exact length definitions; acre and hectare factors are fixed. ConverterBase uses stable definitions and fixed conversion factors, not live or rounded market data.