Convert km to miles — Free Kilometers to Miles Calculator
Convert kilometers to miles instantly. Enter any value and get the exact conversion with the formula displayed. Accurate to 4 decimal places.
Last updated: January 2026
Kilometers to Miles Converter
The kilometers to miles conversion formula
To convert kilometers to miles, multiply by 0.621371. The formula is:
For example: 10 km = 6.2137 miles. This formula works for any value you enter in the calculator above.
Common km to miles conversions
| Kilometers (km) | Miles (miles) |
|---|---|
| 1 | 0.6214 |
| 5 | 3.1069 |
| 10 | 6.2137 |
| 20 | 12.4274 |
| 50 | 31.0686 |
| 100 | 62.1371 |
| 200 | 124.2742 |
Use the converter above to calculate any custom value. The result updates instantly as you type.
Why both kilometers and miles are used
Different countries use different measurement systems for historical reasons. The metric system (meters, kilometers, centimeters) is used in most of the world and is the standard in science and international trade. The imperial system (feet, miles, inches) is primarily used in the United States. This means that professions like engineering, construction, aviation, and international shipping regularly need to convert between the two systems. Knowing both and having a reliable conversion tool is essential for cross-border work.
How to use this converter
Simply type a value in either field — the converter instantly calculates the equivalent in the other unit. The conversion formula is shown below the inputs so you can see exactly how the result was calculated. Use the conversion table for quick reference of common values.
Need more conversions? Try the full unit converter which supports length, weight, temperature, volume, speed, area, energy, and pressure conversions all in one page.
Frequently asked questions about km to miles conversion
How do I convert kilometers to miles?
To convert kilometers to miles, multiply by 0.621371. For example, 1 km × 0.621371 = 0.6214 miles.
What is the formula to convert kilometers to miles?
The formula to convert kilometers to miles is: miles = kilometers × 0.621371. Simply multiply the number of kilometers by 0.621371 to get the equivalent in miles.
What is the difference between kilometers and miles?
Kilometers and miles are units of distance or length. Kilometers are primarily used in the metric system.
Common km to miles conversions
Common conversions include: 1 km = 0.62 miles, 5 km = 3.11 miles, 10 km = 6.21 miles, 20 km = 12.43 miles, 50 km = 31.07 miles, 100 km = 62.14 miles, 200 km = 124.27 miles. Use the calculator above for any value.