Square Mile to Square Kilometer
1 mi² = 2.5899881103 km²
How to convert square mile to square kilometer
Enter the value in square mile (mi²) above and the equivalent in square kilometer (km²) 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 Kilometer to Square Mile
Square Mile to Square Kilometer conversion table
| Square Mile (mi²) | Square Kilometer (km²) |
|---|---|
| 1 | 2.589988 |
| 2 | 5.179976 |
| 5 | 12.949941 |
| 10 | 25.899881 |
| 25 | 64.749703 |
| 50 | 129.499406 |
| 100 | 258.998811 |
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 kilometers is 1 square mile?
1 square mile = 2.589988 square kilometers.
What is the formula to convert square mile to square kilometers?
The formula is: km² = mi² × 2.589988.
What is 10 square miles in square kilometers?
10 square miles = 25.899881 square kilometers.