Square kilometers to square miles
1 square kilometer in square miles
1 km² = 0.3861 mi²
mi² = km² × 0.3861021585
To convert square kilometers to square miles, multiply by 0.3861021585. The table below gives the values people look up most often, and the converter works for any number.
Square kilometers to square miles table
| Square kilometers | Square miles |
|---|---|
| 1 km² | 0.3861 |
| 2 km² | 0.7722 |
| 3 km² | 1.158306 |
| 4 km² | 1.544409 |
| 5 km² | 1.930511 |
| 10 km² | 3.861022 |
| 15 km² | 5.791532 |
| 20 km² | 7.722043 |
| 25 km² | 9.652554 |
| 30 km² | 11.58306 |
| 40 km² | 15.44409 |
| 50 km² | 19.30511 |
| 75 km² | 28.95766 |
| 100 km² | 38.61022 |
| 250 km² | 96.52554 |
| 500 km² | 193.0511 |
| 1,000 km² | 386.1022 |
How the conversion works
The relationship is mi² = km² × 0.3861021585. Both units measure area, so the conversion is a fixed factor that never changes.
Common questions
- How many square miles are in one square kilometer?
- One square kilometer equals 0.3861 square miles. mi² = km² × 0.3861021585.
- How do you convert square kilometers to square miles?
- Use mi² = km² × 0.3861021585. So 10 km² is 3.861022 mi².
- How many square kilometers are in one square mile?
- One square mile equals 2.589988 square kilometers, 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