Square Kilometres to Square Miles
Convert square kilometres (km²) to square miles (mi²) instantly — with formula and reference table.
km²
mi²
Quick answer: 1 km² = 0.386102 mi². To convert square kilometres to square miles, multiply by km² × 0.386102.
Converting square kilometres to square miles
This converter changes a value in square kilometres (km²) into square miles (mi²). One square kilometre equals 0.386102 mi². One square kilometre equals 0.386 square miles. The conversion runs entirely in your browser — enter a value and the result updates instantly, in either direction.
Formula
mi² = km² × 0.386102
Example
Convert 10 km² to mi²: 10 × 0.386102 = 3.861022 mi².
Square Kilometres to Square Miles conversion table
| Square Kilometres (km²) | Square Miles (mi²) |
|---|---|
| 1 km² | 0.386102 mi² |
| 2 km² | 0.772204 mi² |
| 3 km² | 1.158306 mi² |
| 5 km² | 1.930511 mi² |
| 10 km² | 3.861022 mi² |
| 20 km² | 7.722043 mi² |
| 25 km² | 9.652554 mi² |
| 50 km² | 19.305108 mi² |
| 100 km² | 38.610216 mi² |
How to use this converter
- Enter a value in the square kilometres (km²) field.
- Read the converted value in square miles (mi²) below.
- Type into the mi² field instead to convert in reverse, or use the swap button.
Frequently asked questions
How many square miles are in a square kilometre?
1 square kilometre equals 0.386 square miles.
How do I convert 100 sq km to sq miles?
100 times 0.386 = 38.6 square miles.
How big is a square mile in square km?
1 square mile equals 2.59 square kilometres.