AREA CONVERSION
Square kilometer to Square mile.
Convert square kilometer (km²) to square mile (mi²), with the math explained.
1 km² = 0.3861021585 mi²
THE MATH, MADE SIMPLE
How to convert square kilometer to square mile
Multiply your square kilometer value by 0.386102158542 to get the equivalent in square mile. Both units are normalized through the square meter.
mi² = km² × 0.386102158510 km² = 3.86102158542 mi²
Result rounded to 12 significant digits. Change the precision in the calculator to suit your task.QUICK REFERENCE
km² to mi² conversion table
| Square kilometer (km²) | Square mile (mi²) |
|---|---|
| 1 km² | 0.386102158542 mi² |
| 2 km² | 0.772204317085 mi² |
| 5 km² | 1.93051079271 mi² |
| 10 km² | 3.86102158542 mi² |
| 20 km² | 7.72204317085 mi² |
| 50 km² | 19.3051079271 mi² |
| 100 km² | 38.6102158542 mi² |
| 500 km² | 193.051079271 mi² |
| 1,000 km² | 386.102158542 mi² |
About the square kilometer
The square kilometer (km²) is a unit of area. One square kilometer equals 1,000,000 square meter (base unit) in this calculator.
All square kilometer conversionsAbout the square mile
The square mile (mi²) is a unit of area. One square mile equals 2,589,988.11034 square meter (base unit) in this calculator.
All square mile conversionsCommon questions
What is 1 km² in mi²?
One square kilometer equals 0.386102158542 mi². Use the formula above for other values.
Why might another calculator show a different last digit?
Calculators may round at different stages or use different unit conventions. We keep full JavaScript numeric precision during calculation and round only for display. Choose up to 15 significant digits. Check US versus UK units and the notes for this category.
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