Kilometers to Miles Converter
Convert kilometers to miles and miles to kilometers instantly. Includes common distance conversions table.
Kilometers to Miles Conversion
The conversion factor between kilometers and miles is: 1 kilometer = 0.621371 miles, or equivalently, 1 mile = 1.60934 kilometers.
Quick reference table:
- 5 km = 3.11 miles
- 10 km = 6.21 miles
- 21.1 km (half marathon) = 13.11 miles
- 42.2 km (marathon) = 26.22 miles
- 100 km = 62.14 miles
Quick Mental Math
For a rough conversion without a calculator, multiply km by 0.6 (or divide by 1.6). For slightly better accuracy, use the Fibonacci sequence trick: consecutive Fibonacci numbers approximate the km-to-miles conversion (e.g., 8 km ≈ 5 miles, 13 km ≈ 8 miles).
Frequently Asked Questions
Why do some countries use miles and others kilometers?
Most countries adopted the metric system. Only the US, UK (partially), Liberia, and Myanmar still use miles for road distances. The UK uses miles on road signs but kilometers in many other contexts.
How do I convert miles to km?
Multiply miles by 1.60934. Example: 10 miles = 16.09 km.
Is a nautical mile the same as a regular mile?
No. A nautical mile is 1.852 km (1.151 regular miles). It is used in maritime and aviation navigation.