Square miles to square kilometers
1 square mile in square kilometers
1 mi² = 2.589988 km²
km² = mi² × 2.58998811
To convert square miles to square kilometers, multiply by 2.58998811. The table below gives the values people look up most often, and the converter works for any number.
Square miles to square kilometers table
| Square miles | Square kilometers |
|---|---|
| 1 mi² | 2.589988 |
| 2 mi² | 5.179976 |
| 3 mi² | 7.769964 |
| 4 mi² | 10.35995 |
| 5 mi² | 12.94994 |
| 10 mi² | 25.89988 |
| 15 mi² | 38.84982 |
| 20 mi² | 51.79976 |
| 25 mi² | 64.7497 |
| 30 mi² | 77.69964 |
| 40 mi² | 103.5995 |
| 50 mi² | 129.4994 |
| 75 mi² | 194.2491 |
| 100 mi² | 258.9988 |
| 250 mi² | 647.497 |
| 500 mi² | 1,294.9941 |
| 1,000 mi² | 2,589.9881 |
How the conversion works
The relationship is km² = mi² × 2.58998811. Both units measure area, so the conversion is a fixed factor that never changes.
Common questions
- How many square kilometers are in one square mile?
- One square mile equals 2.589988 square kilometers. km² = mi² × 2.58998811.
- How do you convert square miles to square kilometers?
- Use km² = mi² × 2.58998811. So 10 mi² is 25.89988 km².
- How many square miles are in one square kilometer?
- One square kilometer equals 0.3861 square miles, which is the reverse of the conversion above.
Related pages
Sources
- Guide for the Use of the International System of Units (SP 811) — NIST (Public domain (US Government))
- The International System of Units (SI Brochure) — Bureau International des Poids et Mesures
- Calculated on this page — At One Place