Kilometers to Miles Converter
1 kilometer (km) = 0.621371 miles. A 5 km run = 3.107 miles. A marathon (42.195 km) = 26.22 miles.
Inverse conversion
1 mile (mi) = exactly 1.60934 km. A 26.2-mile marathon equals 42.195 km. 1 mile drive = 1.609 km.
Formula
Formula
mi = km × 0.621371
Worked example
To convert 42.195 km (marathon) to miles, multiply 42.195 × 0.621371. Result: 26.219 mi.
Quick reference table
| km | mi |
|---|---|
| 1 | 0.621371 |
| 5 | 3.106856 |
| 10 | 6.213712 |
| 20 | 12.427424 |
| 50 | 31.06856 |
| 100 | 62.137119 |
| 200 | 124.274238 |
| 500 | 310.685596 |
Unit definitions
Kilometer (km)
The kilometer (km) is 1,000 meters. It is the standard unit for road distances in most countries worldwide.
Mile (mi)
The mile (mi) is an imperial unit equal to exactly 1,609.344 m (1.609344 km). Used for road distances in the US and UK.
Common use cases
- Reading road signs when traveling between metric and imperial countries
- Running and cycling events
- GPS and mapping apps with unit switching
- Vehicle fuel economy: km/L vs miles/gallon