Kilometres to Miles Converter
1 kilometre = 0.621371 miles.
Enter a value
Result
1 kilometre =
0.621371 mi
1 km × 0.621371 = 0.621371 mi
1 inch = 2.54 cm exactly · 1 mile = 1.609344 km exactly
The working
- 1. Convert 1 km to metres: 1 × 1,000 = 1,000.
- 2. Convert to mi: 1,000 ÷ 1,609.34 = 0.621371.
1 km in every unit
Handy reference lengths
- A4 sheet (long side)
- 29.7 cm
- Standard door height
- 2.03 m
- Football pitch
- 105 m
- Marathon
- 42.195 km
Conversion table
Kilometres to Miles
| Kilometres | Miles |
|---|---|
| 1 | 0.62137 |
| 2 | 1.2427 |
| 3 | 1.8641 |
| 4 | 2.4855 |
| 5 | 3.1069 |
| 6 | 3.7282 |
| 7 | 4.3496 |
| 8 | 4.971 |
| 9 | 5.5923 |
| 10 | 6.2137 |
| 15 | 9.3206 |
| 20 | 12.427 |
| 25 | 15.534 |
| 50 | 31.069 |
| 100 | 62.137 |
Miles to Kilometres
| Miles | Kilometres |
|---|---|
| 1 | 1.6093 |
| 2 | 3.2187 |
| 3 | 4.828 |
| 4 | 6.4374 |
| 5 | 8.0467 |
| 6 | 9.6561 |
| 7 | 11.265 |
| 8 | 12.875 |
| 9 | 14.484 |
| 10 | 16.093 |
| 15 | 24.14 |
| 20 | 32.187 |
| 25 | 40.234 |
| 50 | 80.467 |
| 100 | 160.93 |
Formula and worked example
miles = kilometres × 0.6213711922 (1 mile is exactly 1.609344 km).
Convert 10 kilometres to miles: 10 × 0.62137119 = 6.21371 mi.
When you need this
Race distances (5K, 10K), road signs outside the UK and US, and fitness apps use kilometres, but many runners and drivers think in miles. A 10 km run is the classic example.
Questions people ask
How many miles are in a kilometre?
One kilometre is 0.62137119 miles. 1 mile is exactly 1.609344 km.
How do I convert kilometres to miles?
Multiply the number of kilometres by 0.62137119, or divide by 1.609344.
What is 10 km in mi?
10 kilometres is 6.21371 miles.
How do I convert miles back to kilometres?
Multiply by 1.609344: one mile is 1.609344 kilometres.
Related conversions
How we calculate this
We use the standard published formula or definition for this calculation, and we show the working so you can check it. Source: NIST Special Publication 811, Guide for the Use of the International System of Units.
Spotted a mistake? Tell us and we'll check it. How we check our calculators