km to miles – convert kilometres to miles
Convert km to miles (kilometres to miles) for driving directions, running routes, cycling distances and travel. This page opens the main length converter with km → mi pre-selected.
Open the interactive km → mi converter:
Use main converter (km → mi) or switch to miles → kmYou can mix kilometres, miles, metres, feet and yards on the homepage using the dropdowns and swap button.
Quick reference: km to miles
1 kilometre is about 0.621371 miles. Useful conversions:
| Kilometres (km) | Miles (mi, approx.) |
|---|---|
| 1 km | 0.62 mi |
| 5 km | 3.11 mi |
| 10 km | 6.21 mi |
| 21.1 km | 13.11 mi (half marathon) |
| 42.2 km | 26.22 mi (marathon) |
| 100 km | 62.14 mi |
Why convert kilometres to miles?
People usually convert km to miles when they:
- Compare road distances between metric countries and the US/UK.
- Translate running race distances into a more familiar unit.
- Read car fuel consumption figures or range in mixed units.
- Plan travel routes using maps or GPS set to a different system.
More distance converters on this site
km to miles FAQ
What is the exact formula for km to miles?
Multiply kilometres by 0.621371. Example: 50 km × 0.621371 ≈ 31.07 mi.
Is 1 mile exactly 1.6 km?
1 mile is about 1.609 km, so 1.6 km is a handy estimate but slightly short.
How can I estimate km to miles quickly?
A simple mental shortcut is km × 0.6 for a rough figure, or km ÷ 1.6. Use this converter for precise results.
Page last updated: 2 December 2025.