Convert Square kilometers to Square miles
1 km² = 0.386102159 mi². Enter any amount below — it is converted to Square miles and every other unit at once, using exact conversion factors.
Area conversion
All conversions use the exact definition of each unit expressed in square meters. The imperial factors are exact squares of the length definitions: 1 ft = 0.3048 m, so 1 ft² = 0.09290304 m² exactly. The area is first converted to m², then into the target unit: result = area × factor(from) ÷ factor(to). Example: 50 m² → 538.2 ft².
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Conversion table
| Square kilometers (km²) | Square miles (mi²) |
|---|---|
| 1 km² | 0.386102 mi² |
| 2 km² | 0.772204 mi² |
| 3 km² | 1.158306 mi² |
| 5 km² | 1.930511 mi² |
| 10 km² | 3.861022 mi² |
| 25 km² | 9.652554 mi² |
| 50 km² | 19.305108 mi² |
| 100 km² | 38.610216 mi² |
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