Square kilometers to Square miles converter
Convert square kilometers (km²) to square miles (mi²). Exact: 1 mi = 1609.344 m.
Converter tool
Formula: mi² = km² × 0.3861021585424458
Quick examples
| Square kilometers | Square miles |
|---|---|
| 1 | 0.3861 |
| 2 | 0.7722 |
| 5 | 1.93051 |
| 10 | 3.86102 |
| 50 | 19.305 |
| 100 | 38.61 |
| 250 | 96.526 |
| 1000 | 386.1 |
How to convert Square kilometers to Square miles
Formula: mi² = km² × 0.3861021585424458.
Reverse conversion: km² = mi² × 2.589988110336
Tip: Use the swap button to reverse the calculation instantly.
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Square kilometers → Square miles FAQs
What definitions are used?
Exact SI and US definitions (e.g., 1 ft = 0.3048 m, 1 acre = 4046.8564224 m², 1 mile = 1609.344 m).
How do I go the other way?
km² = mi² × 2.589988110336
Are the results rounded?
Calculations use exact constants; values are displayed with sensible rounding for readability.