Square Kilometer to Square Mile
1 km² = 0.3861021585 mi²
How to convert square kilometer to square mile
Enter the value in square kilometer (km²) above and the equivalent in square mile (mi²) updates as you type. This conversion comes up when comparing apartment sizes listed in square meters vs square feet.
Typical situations: buying land or farmland advertised in acres or hectares; sizing solar panels, carpets, or paint coverage across unit systems.
You can also convert in the other direction: Square Mile to Square Kilometer
Square Kilometer to Square Mile conversion table
| Square Kilometer (km²) | Square Mile (mi²) |
|---|---|
| 1 | 0.386102 |
| 2 | 0.772204 |
| 5 | 1.930511 |
| 10 | 3.861022 |
| 25 | 9.652554 |
| 50 | 19.305108 |
| 100 | 38.610216 |
Watch out for
- An acre is a fixed unit (4,047 m²), not "whatever a local field is"
- Squares of flooring: US "square" in roofing means 100 sq ft
Frequently asked questions
How many square miles is 1 square kilometer?
1 square kilometer = 0.386102 square miles.
What is the formula to convert square kilometer to square miles?
The formula is: mi² = km² × 0.386102.
What is 10 square kilometers in square miles?
10 square kilometers = 3.861022 square miles.