Square miles to Square kilometers converter
Convert square miles (mi²) to square kilometers (km²). Exact: 1 mi² = 2.589988110336 km².
Converter tool
Formula: km² = mi² × 2.589988110336
Quick examples
| Square miles | Square kilometers |
|---|---|
| 1 | 2.58999 |
| 2 | 5.17998 |
| 5 | 12.95 |
| 10 | 25.9 |
| 50 | 129.5 |
| 100 | 259.0 |
| 250 | 647.5 |
| 1000 | 2589.99 |
How to convert Square miles to Square kilometers
Formula: km² = mi² × 2.589988110336.
Reverse conversion: mi² = km² × 0.3861021585424458
Tip: Use the swap button to reverse the calculation instantly.
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Square miles → Square kilometers 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?
mi² = km² × 0.3861021585424458
Are the results rounded?
Calculations use exact constants; values are displayed with sensible rounding for readability.