Square Kilometers to Square Miles Converter
Conversion
Convert square kilometers into square miles using a defined unit relationship.
Formula
Result (mi²) = input (km²) × 0.38610215854245
- Use the units shown beside each field.
- Results update automatically whenever you change an input.
- Displayed values use up to four decimal places, or scientific notation for very small or large numbers. Calculations retain full precision.
- Areas use international imperial units, not historic US survey-foot units.
Example Calculation
Example inputs
- Value in square kilometers: 1 km²
1 km² = 0.386102158542 mi².
Frequently asked questions
How do I use this calculator?
Enter value in square kilometers. The result updates automatically. Use Reset to restore the example values.
What method does it use?
Result (mi²) = input (km²) × 0.38610215854245. Areas use international imperial units, not historic US survey-foot units.
Why might a rounded result differ?
The calculation keeps full numeric precision internally, then rounds the displayed result. Rounding intermediate steps by hand can produce a slightly different answer.
Are my inputs saved online?
No. This calculator processes your inputs in your browser. A recently used list stores only calculator names on this device, not your entered values.
Check the assumptions and units before using this result. Read about calculation methods.