Do not use 1.6 for precision work
Dividing kilometres by 1.6 is a useful estimate, while the exact mile relationship uses 1.609344 kilometres.
Unit converter
KM to Miles Converter
Convert kilometres to miles instantly. Kilometres to miles for roads and races. See the formula, worked examples and practical reference values.
How to convert km to mi
Kilometres to miles is useful for road distances, running events and travel planning when a US or UK distance is preferred.
Formula: mi = km × 0.621371
Reverse formula: km = mi × 1.609344
Worked example
1 km = 0.621371 mi
- = 1,000 m
- = 3,280.839895 ft
- = 39,370.07874 in
Avoid these errors
Common mistakes
Distance conversion does not convert speed automatically
A km/h value needs the speed conversion factor and should not be treated as a plain distance.
Useful for: Road, race and travel distances in miles.
Common km to mi conversions
| kilometres | miles |
|---|---|
| 1 km | 0.621371 mi |
| 5 km | 3.106856 mi |
| 10 km | 6.213712 mi |
| 25 km | 15.53428 mi |
| 50 km | 31.06856 mi |
| 100 km | 62.137119 mi |
| 500 km | 310.685596 mi |
About the units
A kilometre is a metric unit represented by km. A mile is an imperial unit represented by mi. Calculations use the same authoritative registry as the full length converter, retaining full precision until display.
Sources and definitions
NIST — SI units and conversion guidance
Conversion constants come from the shared EzyCalculator unit registry. See how calculations are reviewed and tested.