Convert Kilometers to Miles
Convert kilometers to miles online. Fast, accurate, and free unit converter.
How to Convert Kilometers to Miles
- Take the number of kilometers you want to convert.
- Multiply by 0.621371 (or divide by 1.60934).
- The result is the distance in miles.
Quick Reference
| Kilometers | Miles |
|---|---|
| 1 Kilometers | 1 Miles |
| 5 Kilometers | 5 Miles |
| 10 Kilometers | 10 Miles |
| 21 Kilometers | 21 Miles |
| 42 Kilometers | 42 Miles |
| 100 Kilometers | 100 Miles |
Use Cases
- •Converting road trip distances when traveling between metric and imperial countries.
- •Understanding race distances — translating 5K, 10K, or marathon distances into miles.
- •Reading international maps or GPS data that shows distances in kilometers.
Formula
To convert kilometers to miles, divide the number of kilometers by 1.60934.
Frequently Asked Questions
How many miles is 1 kilometer?
1 kilometer ≈ 0.621371 miles.
How to convert 10 km to miles?
10 ÷ 1.60934 ≈ 6.214 miles.
How many miles is a 5K race?
5 km ÷ 1.60934 ≈ 3.107 miles.
Why do some countries use miles instead of kilometers?
The United States, United Kingdom, and a few other countries historically adopted the imperial system, which uses miles. Most of the world uses the metric system with kilometers.
How do I quickly estimate km to miles in my head?
A handy rule of thumb: multiply kilometers by 0.6. For example, 10 km × 0.6 = 6 miles (exact: 6.21 miles).
How many kilometers is a half marathon in miles?
A half marathon is 21.0975 km, which equals about 13.109 miles.