Convert Square mile to Square kilometre
1 Square mile = 2.5899881 Square kilometre · 1 Square kilometre = 0.386102 Square mile
Conversion formula
1 mi² = 2.58998811 km² → mi² = 2.5899881 km²
The reverse direction: 1 km² = 0.3861021585 mi².
Quick reference
| mi² | km² |
|---|---|
| 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 |
| 250 mi² | 647.49703 km² |
| 500 mi² | 1,295 km² |
| 1,000 mi² | 2,590 km² |
About these units
The Square mile (mi²) and the Square kilometre (km²) are both units of area. Under the standard definition, one mi² equals exactly 2.5899881 km². This category's SI base unit is the square metre.