miles to km – convert miles to kilometres
Convert miles to km (miles to kilometres) for journeys, race distances, cycling routes and road trips. This page opens the main length converter with mi → km pre-selected.
Open the interactive mi → km converter:
Use main converter (mi → km) or switch to km → milesSwitch between miles, kilometres, metres, feet and yards on the homepage with a single dropdown change.
Quick reference: miles to kilometres
1 mile is about 1.60934 km. Common conversions:
| Miles (mi) | Kilometres (km, approx.) |
|---|---|
| 1 mi | 1.61 km |
| 5 mi | 8.05 km |
| 10 mi | 16.09 km |
| 13.1 mi | 21.08 km (half marathon) |
| 26.2 mi | 42.16 km (marathon) |
| 100 mi | 160.93 km |
Why convert miles to kilometres?
Typical reasons include:
- Reading US or UK road signs but thinking in kilometres.
- Converting race distances from miles to metric training plans.
- Mixing navigation apps set to different unit systems.
- Comparing car ranges or fuel economy figures in km vs miles.
More distance converters on this site
miles to km FAQ
What is the formula for miles to kilometres?
Multiply miles by 1.60934. Example: 50 mi × 1.60934 ≈ 80.47 km.
Is 1.6 a good shortcut for converting miles to km?
Yes, 1.6 is a handy rough factor. For precise work, use 1.60934 or this converter.
Why do some countries still use miles?
It’s mostly historical. Some countries kept miles for road signs and speed limits even after adopting metric for most other uses.
Page last updated: 2 December 2025.