Kilometers to Miles Converter
Convert kilometers to miles instantly. Exact formula, quick chart and examples. Free, no signup.
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About the Kilometers to Miles Converter
This free kilometers to miles converter gives the exact result as you type, with no button to press and no signup. It is built for everyday use in the US: recipes, travel, fitness, weather, school work and shopping. The formula and a quick reference chart are included below so you can check the math yourself.
Need the opposite direction? Use the Miles to Kilometers converter.
How to use it
- Type the number of kilometers in the first box.
- Read the result in miles immediately below.
- Use the chart on this page for common values you can check at a glance.
Kilometers to Miles formula
miles = km ÷ 1.609344 (or km × 0.621371)
Example: 10 km × conversion = 6.214 mi.
Quick mental estimate: multiply km by 0.6. 100 km is about 60 miles (exact: 62.14 miles).
km to mi chart
| Kilometers (km) | Miles (mi) |
|---|---|
| 1 km | 0.621 mi |
| 5 km | 3.107 mi |
| 10 km | 6.214 mi |
| 21.1 km | 13.111 mi |
| 42.195 km | 26.219 mi |
| 50 km | 31.069 mi |
| 80 km | 49.71 mi |
| 100 km | 62.137 mi |
| 120 km | 74.565 mi |
| 200 km | 124.274 mi |
| 500 km | 310.686 mi |
mi to km reverse chart
Going the other way? These are the same values read backwards.
| Miles (mi) | Kilometers (km) |
|---|---|
| 0.621 mi | 1 km |
| 3.107 mi | 5 km |
| 6.214 mi | 10 km |
| 13.111 mi | 21.1 km |
| 26.219 mi | 42.195 km |
| 31.069 mi | 50 km |
| 49.71 mi | 80 km |
| 62.137 mi | 100 km |
| 74.565 mi | 120 km |
| 124.274 mi | 200 km |
| 310.686 mi | 500 km |
About kilometers and miles
One kilometer is 1,000 meters, which equals about 0.621371 miles. The mile is the unit used on US road signs, so travelers and runners often need to convert kilometers they see on maps, race posters and rental car dashboards.
Common uses
- Race distances: 5K, 10K and half marathon.
- Driving distances on foreign maps and navigation apps.
- Comparing fuel use and mileage between countries.
Frequently asked questions
How many miles is a 5K?
5 km is 3.107 miles.
How many miles is a 10K?
10 km is 6.214 miles.
How many miles is a marathon in km?
A marathon is 42.195 km, or 26.2 miles.
How many miles is 100 km/h?
100 km/h is about 62.1 mph.
What is the formula to convert kilometers to miles?
miles = km ÷ 1.609344 (or km × 0.621371). This page applies it for you instantly as you type.
Last reviewed: November 2026.
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