Convert between miles and kilometers for running, driving, and travel.
1 mile = 1.60934 kilometers exactly.
The US and UK use miles. Most of the world uses kilometers.
A marathon is 26.2 miles = 42.195 km.
This calculator is most useful when precision matters: technical specifications, recipe scaling, scientific measurements, or any context where an approximate conversion introduces real risk.
Many unit conversion errors arise from treating multiples incorrectly. Converting millimetres to kilometres, for example, requires two separate steps (mm → m, m → km), not a single division by 100.
A cyclist travelling internationally needs to calibrate their bike computer from miles to kilometres. A single precise conversion ensures the display is accurate for the entire trip — the difference between 60 miles and 96.6 km matters when tracking training load.
1 mile = 1.60934 km.
Divide km/h by 1.60934. Example: 100 km/h = 62.14 mph.
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