Miles to kilometers (mi to km)
One mile is exactly 1.609344 kilometers. Runners meet this constantly: the 26.2 miles of a marathon is 42.2 km, and a 5K is just over 3.1 miles. A neat trick: consecutive Fibonacci numbers approximate the ratio - 5 miles is about 8 km.
mi to km conversion table
| Miles (mi) | Kilometers (km) |
|---|---|
| 1 | 1.61 |
| 3 | 4.83 |
| 5 | 8.05 |
| 10 | 16.09 |
| 13.1 | 21.08 |
| 26.2 | 42.16 |
| 50 | 80.47 |
| 100 | 160.93 |
| 500 | 804.67 |
How to convert miles to kilometers
The formula is kilometers = miles x 1.60934. Type any value into the converter above for
an exact result, or use the table for the most common conversions. For other units, the
full length converter handles every combination, and
the unit converter covers length, weight, temperature,
speed, area, volume and data in one place.
Frequently asked questions
How many kilometers are in 1 mile?
1 mi = 1.60934 km. The formula is kilometers = miles x 1.60934; the converter applies it to whatever you type and rounds only for display.
What is 13.1 mi in km?
13.1 mi = 21.08 km, using kilometers = miles x 1.60934.
How do I convert kilometers back to miles?
Use miles = kilometers x 0.621371. For example, 42.2 km = 26.22 mi. The km to mi converter does this for you.