Square kilometres to Square miles Converter
Convert square kilometres (km²) to square miles (sq mi) 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 miles
- 0.386102 sq mi
How to use the square kilometres to square miles converter
- Enter the square kilometres (km²).
- The results update as you type, or press Calculate.
- Read the square miles first, then the supporting figures below it.
Formula
Square miles = square kilometres × 0.3861021585
Worked example
For example, with these inputs:
- Square kilometres (km²): 1
the calculator returns:
- Square miles: 0.386102 sq mi
Square kilometres to Square miles table
| Square kilometres | Square miles |
|---|---|
| 1 km² | 0.386102 sq mi |
| 2 km² | 0.772204 sq mi |
| 5 km² | 1.9305 sq mi |
| 10 km² | 3.861 sq mi |
| 20 km² | 7.722 sq mi |
| 25 km² | 9.6526 sq mi |
| 50 km² | 19.3051 sq mi |
| 100 km² | 38.6102 sq mi |
| 250 km² | 96.5255 sq mi |
| 500 km² | 193.0511 sq mi |
| 1,000 km² | 386.1022 sq mi |
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.
Writing the units next to every number while you work is the simplest way to avoid mistakes. If the units do not cancel to leave the one you want, the calculation is set up wrongly.
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 miles are in one square kilometre?
1 km² = 0.386102 sq mi.
How do I convert km² to sq mi?
Square miles = square kilometres × 0.3861021585.