Square Kilometre to Square Mile
Free instant square kilometre to square mile converter. 1 km² = 0.386102 mi².
Common Square Kilometre to Square Mile values
| Square Kilometre (km²) | Square Mile (mi²) |
|---|---|
| 1 | 0.386102 |
| 5 | 1.93051 |
| 10 | 3.86102 |
| 25 | 9.65255 |
| 50 | 19.3051 |
| 100 | 38.6102 |
| 500 | 193.051 |
| 1000 | 386.102 |
How does Square Kilometre to Square Mile conversion work?
Type a value in the Square Kilometre (km²) field and the equivalent in Square Mile (mi²) appears instantly to the right. The math uses the exact formula shown above — no rounding errors, no approximations beyond standard floating-point precision. Use the swap button to flip the units and see the inverse conversion.
Square Kilometre. A square one kilometre on each side. Equal to 100 hectares or about 247 acres.
Square Mile. A square one mile on each side. About 2.59 square kilometres or 640 acres.
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🎯 Accurate conversions
Conversion factors come from the official standard (NIST, BIPM, ISO definitions where applicable). Values are precise to standard floating-point limits.
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