How to convert miles to kilometers
Common for travel distances, race lengths, and vehicle reporting. Multiply the mile value by the exact unit relationship shown below. CalcOS evaluates through the meter so this route and its inverse always share one certified definition.
km = mi × 1.609344
Worked example: 10 mi = 16.09344 km.
miles to kilometers conversion table
| mile (mi) | kilometer (km) |
|---|---|
| 1 | 1.609344 |
| 5 | 8.04672 |
| 10 | 16.09344 |
| 25 | 40.2336 |
| 50 | 80.4672 |
| 100 | 160.9344 |
Definitions and precision
The international inch, foot, yard, and mile are exact consequences of 1 inch = 0.0254 meter. Metric prefixes are exact powers of ten. Results may still display rounded decimals because many inverse relationships are repeating numbers.
Related length conversions
Sources: BIPM SI Brochure and NIST Handbook 44, Appendix C. Also see the complete Length Converter guide.