Miles to Kilometers (mi to km)
Convert miles to kilometers in one step, learn the formula, and use the quick reference table.
Quick answer: To convert miles to kilometers, multiply the mile value by 1.60934. For example, 10 miles × 1.60934 = 16.09 km. One mile equals about 1.61 kilometers, so kilometer values are always larger numbers than miles.
Miles to kilometers formula
The conversion is based on the international definition of the mile:
kilometers = miles × 1.609344
Because one mile is defined as exactly 1.609344 kilometers, this factor gives an exact result. For everyday use you can round it to 1.60934 with no meaningful loss of accuracy.
How to convert miles to km in 3 steps
- Take the distance in miles (for example, 26.2 mi, a marathon).
- Multiply by 1.609344 → 26.2 × 1.609344 = 42.1648.
- Round as needed → 26.2 mi ≈ 42.16 km.
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| Miles (mi) | Kilometers (km) |
|---|---|
| 1 mi | 1.6093 km |
| 5 mi | 8.0467 km |
| 10 mi | 16.0934 km |
| 13.1 mi | 21.0824 km |
| 26.2 mi | 42.1648 km |
| 50 mi | 80.4672 km |
| 60 mi | 96.5606 km |
| 100 mi | 160.9344 km |
Miles vs kilometers
The mile (mi) is a unit of distance in the imperial and US customary systems, used in the United States and the United Kingdom for road distance. The kilometer (km) is a metric unit of distance used worldwide. Because 1 mile ≈ 1.61 km, kilometer values are always larger numbers than the equivalent miles.
Frequently asked questions
How do you convert miles to kilometers?
Multiply the mile value by 1.60934. For example, 10 miles × 1.60934 = 16.09 km.
How many km is 1 mile?
One mile equals about 1.609 kilometers.
How many km is a marathon (26.2 miles)?
A 26.2-mile marathon is about 42.16 kilometers (26.2 × 1.609344 = 42.1648 km).