Convert Square Miles to Square Kilometers
1 square mile = 2.5899881 square kilometers. Multiply the number of square miles by 2.58998811034.
Square Miles to Square Kilometers table
| Square Miles | Square Kilometers |
|---|---|
| 1 mi² | 2.5899881 km² |
| 2 mi² | 5.1799762 km² |
| 3 mi² | 7.7699643 km² |
| 4 mi² | 10.359952 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 |
| 500 mi² | 1,294.9941 km² |
| 1000 mi² | 2,589.9881 km² |
Square Miles to Square Kilometers in your head
Multiply by 13, then divide by 5.
That lands within 0.4% of the exact value.
10 mi² → 26 km² in your head, 25.8999 km² exactly.
About these units
The square mile (mi²) is an imperial unit of area, equal to 2,589,988.1 square meters.
The square kilometer (km²) is a metric unit of area, equal to 1,000,000 square meters.
Going the other way, 1 square kilometer = 0.38610216 square miles. From flooring quotes in square feet to farmland in hectares and plot sizes in cents, guntha or bigha, area units are stubbornly regional. All of them are supported here, converted through the square metre.
Frequently asked
- How many square kilometers are in a square mile?
- 1 square mile = 2.5899881 square kilometers.
- How do you convert square miles to square kilometers?
- Multiply the number of square miles by 2.58998811034.
- What is 10 mi² in km²?
- 10 mi² = 25.899881 km².