Square miles to Square kilometers
Convert square miles to square kilometers instantly. 1 mi² = 2.58999 km²
Result
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Quick answers
- 1 mi² = 2.59 km²
- 5 mi² = 12.95 km²
- 10 mi² = 25.9 km²
- 20 mi² = 51.8 km²
- 50 mi² = 129.5 km²
- 100 mi² = 259 km²
Square miles to Square kilometers conversion table
| Square miles (mi²) | Square kilometers (km²) |
|---|---|
| 1 mi² | 2.59 km² |
| 2 mi² | 5.18 km² |
| 3 mi² | 7.77 km² |
| 4 mi² | 10.36 km² |
| 5 mi² | 12.95 km² |
| 6 mi² | 15.54 km² |
| 7 mi² | 18.13 km² |
| 8 mi² | 20.72 km² |
| 9 mi² | 23.31 km² |
| 10 mi² | 25.9 km² |
| 15 mi² | 38.85 km² |
| Square miles (mi²) | Square kilometers (km²) |
|---|---|
| 20 mi² | 51.8 km² |
| 25 mi² | 64.75 km² |
| 30 mi² | 77.7 km² |
| 40 mi² | 103.6 km² |
| 50 mi² | 129.5 km² |
| 75 mi² | 194.25 km² |
| 100 mi² | 259 km² |
| 250 mi² | 647.5 km² |
| 500 mi² | 1,295 km² |
| 1,000 mi² | 2,590 km² |
Conversion formula
square kilometers = square miles × 2.58998811
Example: 10 mi² × 2.58998811 = 25.9 km²
A square mile is 640 acres, about 2.59 square kilometers. A square kilometer is 100 hectares, about 0.386 square miles.
You may also see this conversion written as “sq miles to sq km”.
Questions
How many square kilometers are in one square mile?
One square mile is 2.58998811 square kilometers.
How do you convert square miles to square kilometers?
Multiply by 2.58998811. The factor comes from the exact definitions of both units, so the only rounding is in the display.
Related conversions
- Square kilometers to square miles1 km² = 0.3861 mi²
- Square miles to acres1 mi² = 640 ac
- Acres to square miles1 ac = 0.0015625 mi²
- Square feet to square meters1 ft² = 0.092903 m²
- Square meters to square feet1 m² = 10.764 ft²
- Acres to hectares1 ac = 0.40469 ha
- Hectares to acres1 ha = 2.4711 ac
- Acres to square feet1 ac = 43,560 ft²
Updated