1 square mile (mi²) = 2.58998811 square kilometers (km²). To convert, multiply by 2.58998811: km² = mi² × 2.58998811. For example, 5 mi² = 12.94994055 km².
km² = mi² × 2.58998811
Square miles to square kilometers table
| Square miles (mi²) | Square kilometers (km²) |
|---|---|
| 1 | 2.58998811 |
| 2 | 5.179976221 |
| 3 | 7.769964331 |
| 4 | 10.35995244 |
| 5 | 12.94994055 |
| 10 | 25.8998811 |
| 20 | 51.79976221 |
| 25 | 64.74970276 |
| 50 | 129.4994055 |
| 100 | 258.998811 |
| 250 | 647.4970276 |
| 500 | 1,294.994055 |
| 1,000 | 2,589.98811 |
The two units
Square mile (mi²). 640 acres.
Square kilometer (km²). One million square meters, or 100 hectares.
Convert square miles to other units
- Square miles to square meters — 1 mi² = 2,589,988.11 m²
- Square miles to square centimeters — 1 mi² = 25,899,881,100 cm²
- Square miles to hectares — 1 mi² = 258.998811 ha
- Square miles to acres — 1 mi² = 640 ac
- Square miles to square feet — 1 mi² = 27,878,400 ft²
- Square miles to square inches — 1 mi² = 4,014,489,600 in²
- Square miles to square yards — 1 mi² = 3,097,600 yd²
Convert other units to square kilometers
Questions people ask
- How many square kilometers are in a square mile?
- 2.58998811.
- How do you convert square miles to square kilometers?
- km² = mi² × 2.58998811. It is the same as dividing by 0.3861021585.
- How do you convert square kilometers back to square miles?
- mi² = km² ÷ 2.58998811. See square kilometers to square miles.
Results use the legal definitions of each unit and are checked against the Pint unit library. Display rounds to 10 significant digits. All unit conversions · More tools
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