Miles to KM converter
1 mi = 1.609344 km
The international mile is exactly 1.609 344 km. Runners use this constantly: a marathon is 26.2 mi, or 42.195 km the official World Athletics distance.
26.2 mi = 42.1648128 km
Formula: km = mi × 1.609344
26.2 mi in every length unit
- millimetre
- centimetre
- metre
- kilometre
- inch
- foot
- yard
- nautical mile
How to convert miles to kilometres
km = mi × 1.609344
Example: 26.2 mi × 1.609344 = 42.1648128 km.
mile: 1 mi = 5280 ft = 1609.344 m (NIST SP 811, App. B (1959 yard & pound agreement))
kilometre: 1 km = 1000 m (BIPM SI Brochure)
Going the other way? Use the km to miles converter.
Where the number 1.609344 comes from
Nothing is measured here. Every step below is a definition written into law or into the SI.
1 mi
Miles to KM table
| miles (mi) | kilometres (km) |
|---|---|
| 1 | 1.609344 |
| 2 | 3.218688 |
| 3 | 4.828032 |
| 3.1 | 4.988966 |
| 5 | 8.04672 |
| 6.2 | 9.977933 |
| 10 | 16.09344 |
| 13.1 | 21.08241 |
| 15 | 24.14016 |
| 20 | 32.18688 |
| 25 | 40.2336 |
| 26.2 | 42.16481 |
| 30 | 48.28032 |
| 40 | 64.37376 |
| 50 | 80.4672 |
| 60 | 96.56064 |
| 70 | 112.6541 |
| 100 | 160.9344 |
| 200 | 321.8688 |
| 500 | 804.672 |
Questions
How many kilometres are in 1 mile?
1 mi = 1.609344 km.
What is the formula to convert miles to kilometres?
km = mi × 1.609344. 1 mi = 5280 ft = 1609.344 m; 1 km = 1000 m.
Is this conversion exact?
Yes. Both units are defined exactly (NIST SP 811, App. B (1959 yard & pound agreement); BIPM SI Brochure), so the factor is exact and results are only rounded for display.
What is 26.2 mi in km?
26.2 mi = 42.1648128 km.