Calcometry
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Km to Miles Converter
Convert kilometers to miles (and back) instantly. Handy for road trips, running, and travel abroad.
Kilometers
km
Miles
mi
1 km = 0.621371 mi
Convert Kilometers
Quick presets
Miles
6.2137 mi
10 km = 6.2137 mi
- 1 km
- 0.621371 mi
- 5 km
- 3.1069 mi
- 10 km
- 6.2137 mi
- 21.1 km
- 13.1109 mi
- 42.195 km
- 26.2188 mi
- 100 km
- 62.1371 mi
- 1,000 km
- 621.37 mi
Related calculators
Kilometers vs miles
Kilometers are the everyday metric unit for road distance in most countries. Miles are standard in the US and UK. One international mile equals 1.609344 kilometers.
Common questions
My car odometer shows km — how do I read US speed limits?
US limits are in mph. 65 mph is about 105 km/h. When driving abroad, convert the posted limit rather than guessing: 100 km/h is roughly 62 mph.
Is a half marathon 13.1 miles or 21.1 km?
Both describe the same distance. A half marathon is 21.0975 km, which is about 13.109 miles. Race bibs may show one unit depending on the country.
How quickly can I estimate km to miles while driving?
Multiply km by 0.62 for a rough miles estimate (or divide km by 8 and multiply by 5). Example: 80 km → about 50 mi. For exact tolls or fuel logging, use the full conversion.
Do GPS apps always show the same unit as local road signs?
Not always — app settings may override local defaults. Before a trip, set distance and speed units to match the country you are driving in so limits and arrival times make sense.