Kilometers to Miles Converter
Convert kilometers to miles instantly with our free online calculator. Whether you're tracking running distances, planning road trips, or converting international measurements, this tool provides accurate conversions.
Conversion Formula
| Conversion | Formula | Example | km to mileskm × 0.62137110 km = 6.21 miles miles to kmmiles × 1.6093410 miles = 16.09 km
Quick Reference Table
KilometersMilesCommon Use 1 km0.62 miShort walk 5 km3.11 mi5K race distance 10 km6.21 mi10K race distance 21.1 km13.1 miHalf marathon 42.2 km26.2 miFull marathon 100 km62.14 miLong driving distance
Why the Difference?
The kilometer is based on the metric system (1/10,000 of the distance from Earth's equator to the North Pole), while the mile has Roman origins (1,000 paces). The metric system is used in most countries, while the US, UK (for roads), and a few others use miles.
Running Pace Conversion
Pace (min/km)Pace (min/mile) 4:006:26 5:008:03 6:009:39 | 7:00 | 11:16 |
Conversion Code Example
``javascript
function kmToMiles(km) {
return km * 0.621371;
}
function milesToKm(miles) {
return miles * 1.60934;
}
// Examples
console.log(kmToMiles(10)); // 6.21371
console.log(milesToKm(10)); // 16.0934
``
Country Usage
| System | Countries | Metric (km)Most of the world Imperial (miles)USA, Liberia, Myanmar | Mixed | UK (miles for roads, km for other) |
Use this converter for accurate distance conversions between metric and imperial systems.