QConvert
Square Mile to Square Kilometer Converter
Convert Square Mile to Square Kilometer instantly — live results with exact conversion factors.
Answer
1 square mile = 2.58998811 square kilometers. To convert mi² to km², multiply by 2.58998811.
Quick Reference Table
| Square Mile (mi²) | Square Kilometer (km²) |
|---|---|
| 1 | 2.58998811 |
| 2 | 5.17997622 |
| 5 | 12.9499406 |
| 10 | 25.8998811 |
| 20 | 51.7997622 |
| 50 | 129.499406 |
| 100 | 258.998811 |
| 250 | 647.497028 |
| 500 | 1294.994055 |
| 1000 | 2589.98811 |
Formula
Convert Square Mile (mi²) to Square Kilometer (km²) using the relationship:
km² = mi² × 2.58998811
How to Convert
- Take the value in square miles (mi²).
- Multiply it by 2.58998811 (the conversion factor from mi² to km²).
- The result is the equivalent value in square kilometers (km²).
- Example: 1 mi² = 2.58998811 km².
Reverse Conversion
Need it the other direction? Square Kilometer to Square Mile conversion.
All Area Conversions
See the full list of Area conversions.
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FAQ
▸ How many square kilometers are in 1 square mile?
1 Square Mile equals 2.58998811 square kilometers. Multiply by 2.58998811 to convert mi² to km².
▸ What is the formula to convert square mile to square kilometer?
Multiply the value in square miles by 2.58998811 to get square kilometers. Formula: km² = mi² × 2.58998811.
▸ How do I convert square miles to square kilometers easily?
Enter your value in the converter at the top of this page — the square kilometers result updates live as you type. You can also multiply by 2.58998811 directly.