square miles to square kilometers
Convert square mile to square kilometer — instant, free, with the formula shown.
1 mi²=2.589988 km²
How to convert square mile to square kilometer
To convert square mile to square kilometer, multiply by 2.58998811:
km² = mi² × 2.58998811
For example, 10 mi² × 2.589988 = 25.899881 km².
mi² to km² conversion table
| square miles (mi²) | square kilometers (km²) |
|---|---|
| 1 mi² | 2.589988 km² |
| 2 mi² | 5.179976 km² |
| 5 mi² | 12.949941 km² |
| 10 mi² | 25.899881 km² |
| 25 mi² | 64.749703 km² |
| 50 mi² | 129.499406 km² |
| 100 mi² | 258.998811 km² |
| 250 mi² | 647.497028 km² |
| 500 mi² | 1294.994055 km² |
| 1000 mi² | 2589.98811 km² |
Other square mile conversions
Convert to square kilometer from another unit
mi² to km² — frequently asked
How many square kilometers are in 1 square mile?
1 square mile = 2.589988 square kilometers (mi² × 2.589988 = km²).
What is the formula to convert square mile to square kilometer?
Multiply your square mile value by 2.58998811 to get square kilometer.
How do I convert 10 square miles to square kilometers?
10 mi² = 25.899881 km². For 100 mi² the answer is 258.998811 km². Use the calculator on this page for any other value.
When to convert square mile to square kilometer
1Real estate and property (sq ft, acres)
2Agriculture (hectares, acres)
3Construction and flooring (m², sq ft)
4Surveying and mapping (km², mi²)
Area conversion — common questions
How many square feet in 1 acre?
1 acre = 43,560 ft² ≈ 4,046.86 m² ≈ 0.4047 hectares.
Is 1 hectare bigger than 1 acre?
Yes. 1 hectare = 10,000 m² ≈ 2.4711 acres.
How do I convert square meters to square feet?
Multiply by 10.7639. So 100 m² = 1,076.39 ft².
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