Convert square miles to square kilometers and square kilometers to square miles instantly. Bidirectional area converter with formula and common values.
To convert square miles to square kilometers, multiply by 2.58999. This factor comes from squaring the miles-to-kilometers conversion (1.60934²).
| Square Miles | Square Kilometers |
|---|---|
| 0.5 | 1.2950 |
| 1 | 2.5900 |
| 3.5 | 9.0650 |
| 5 | 12.9500 |
| 25 | 64.7498 |
| 100 | 258.9990 |
| 500 | 1,294.9950 |
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One square mile equals approximately 2.58999 square kilometers.
Multiply the number of square miles by 2.58999. For example, 3.5 sq mi × 2.58999 = 9.065 km².
One square mile equals 2.58999 km², 258.999 hectares, or 2,589,988 square meters.
The City of London (the historic financial district) is about 1.12 sq mi (2.90 km²). Many small towns are close to one square mile.