Convert Square Mile to Square Kilometer
1 square mile = 2.5899881 square kilometers (mi² to km²).
A square mile is larger than a square kilometer — one square mile contains 2.58999 square kilometers. Both units describe area, and the reverse is just as easy — one square kilometer equals 0.386102 square miles. The converter above does this in real time, and the reference chart lists the values that come up most often.
1 mi² = 2.5899881 km²
How to convert Square Miles to Square Kilometers
Multiply the square mile value by 2.58999 to get square kilometers.
Example: 10 square miles = 25.8999 square kilometers.
Square Mile to Square Kilometer Conversion Chart
| Square Miles | Square Kilometers |
|---|---|
| 1 mi² | 2.5899881 km² |
| 2 mi² | 5.1799762 km² |
| 3 mi² | 7.7699643 km² |
| 5 mi² | 12.949941 km² |
| 10 mi² | 25.899881 km² |
| 20 mi² | 51.799762 km² |
| 25 mi² | 64.749703 km² |
| 50 mi² | 129.49941 km² |
| 100 mi² | 258.99881 km² |
| 1000 mi² | 2,589.9881 km² |
Frequently Asked Questions
- How many square kilometers are in a square mile?
- There are 2.5899881 square kilometers in 1 square mile.
- How do you convert square miles to square kilometers?
- Multiply the square mile value by 2.58999 to get square kilometers.
- What is 5 square miles in square kilometers?
- 5 square miles equals 12.949941 square kilometers.
- What is 100 square miles in square kilometers?
- 100 square miles equals 258.99881 square kilometers.
- What is 1 square kilometer in square miles?
- 1 square kilometer equals 0.38610216 square miles.
- Is this square mile to square kilometer converter free?
- Yes. The converter is free, needs no sign-up, and runs entirely in your browser — the values you enter never leave your device.