KM to Miles Converter
By Santaji GadepatilinUpdated October 27, 2026
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Type in any field to change it. Press × on a value to calculate that field instead.
How to use this converter
Type a distance in kilometres or miles (or metres, or nautical miles) and the other units update instantly.
Formula
miles = km × 0.621371 km = miles × 1.609344
Example: a 10 km run is 10 × 0.621371 = 6.21 miles. A 26.2-mile marathon is 26.2 × 1.609344 = 42.2 km.
Conversion table
| Kilometres | Miles |
|---|---|
| 1 km | 0.621371 mi |
| 5 km | 3.10686 mi |
| 10 km | 6.21371 mi |
| 21.0975 km | 13.1094 mi |
| 42.195 km | 26.2188 mi |
| 50 km | 31.0686 mi |
| 100 km | 62.1371 mi |
| 500 km | 310.686 mi |
| Miles | Kilometres |
|---|---|
| 1 mi | 1.60934 km |
| 5 mi | 8.04672 km |
| 10 mi | 16.0934 km |
| 26.2188 mi | 42.1951 km |
| 60 mi | 96.5606 km |
| 100 mi | 160.934 km |
Running race distances
| Race | km | miles |
|---|---|---|
| 5K | 5 | 3.11 |
| 10K | 10 | 6.21 |
| Half marathon | 21.1 | 13.1 |
| Marathon | 42.195 | 26.2 |
Mental trick
Use the Fibonacci numbers: 3 miles ≈ 5 km, 5 miles ≈ 8 km, 8 miles ≈ 13 km. Or multiply km by 0.6 for a quick estimate.
Nautical miles
Sea and air navigation use the nautical mile (1,852 m), based on one minute of latitude. Speed in nautical miles per hour is a knot.
Frequently asked questions
How many miles is 1 km?
0.621371 miles.
How many km is 1 mile?
Exactly 1.609344 km.
How far is a 5K in miles?
3.107 miles.