// Surveyor Tools
How many square miles are in a square kilometer?
1 km² = 0.3861 sq mi
1 sq mi = 2.59 km²
A square kilometer is 0.3861 square miles, and a square mile is 2.59 square kilometers. One square kilometer is 100 hectares.
Quick conversion
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Conversion table
| Square kilometre (km²) | Square mile (mi²) |
|---|---|
| 1 | 0.3861 |
| 2 | 0.7722 |
| 3 | 1.1583 |
| 4 | 1.5444 |
| 5 | 1.9305 |
| 10 | 3.861 |
| 20 | 7.722 |
| 50 | 19.3051 |
| 100 | 38.6102 |
| Square mile (mi²) | Square kilometre (km²) |
|---|---|
| 1 | 2.59 |
| 2 | 5.18 |
| 3 | 7.77 |
| 4 | 10.36 |
| 5 | 12.9499 |
| 10 | 25.8999 |
| 20 | 51.7998 |
| 50 | 129.5 |
| 100 | 259 |
How big each land unit is
| Unit | In m² | In hectares | Where it is used |
|---|---|---|---|
| Square kilometre (km²) | 1,000,000 | 100 | 1 km² = 100 ha |
| Square mile (mi²) | 2,589,988.11 | 259 | USA, UK |
FAQ
How many acres are in a square kilometer?
About 247.1 acres.
Other conversions
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