Square miles to Square kilometres Converter
Convert square miles (sq mi) to square kilometres (km²) instantly. Area conversions are everyday maths in Singapore property: HDB flats are listed in square metres while condo listings and PSF prices use square feet.
Result
- Square kilometres
- 2.59 km²
How to use the square miles to square kilometres converter
- Enter the square miles (sq mi).
- The results update as you type, or press Calculate.
- Read the square kilometres first, then the supporting figures below it.
Formula
Square kilometres = square miles × 2.5899881103
Worked example
For example, with these inputs:
- Square miles (sq mi): 1
the calculator returns:
- Square kilometres: 2.59 km²
Square miles to Square kilometres table
| Square miles | Square kilometres |
|---|---|
| 1 sq mi | 2.59 km² |
| 2 sq mi | 5.18 km² |
| 5 sq mi | 12.9499 km² |
| 10 sq mi | 25.8999 km² |
| 20 sq mi | 51.7998 km² |
| 25 sq mi | 64.7497 km² |
| 50 sq mi | 129.4994 km² |
| 100 sq mi | 258.9988 km² |
| 250 sq mi | 647.497 km² |
| 500 sq mi | 1,294.99 km² |
| 1,000 sq mi | 2,589.99 km² |
About this conversion
Area conversions are everyday maths in Singapore property: HDB flats are listed in square metres while condo listings and PSF prices use square feet.
Unit conversion is simply multiplication by a fixed ratio. The ratio between two units of the same quantity never changes, so once you know it you can convert any value in either direction.
For everyday use, three or four significant figures are usually enough. Engineering, science and trade documents may need more, and rounding should happen only at the end of a calculation.
Frequently asked questions
How many square kilometres are in one square mile?
1 sq mi = 2.59 km².
How do I convert sq mi to km²?
Square kilometres = square miles × 2.5899881103.