Unit Converters
Miles to km converter.
Type miles or kilometres and the other box updates as you type. One international mile is exactly 1.609344 km, so km = mi × 1.609344. Runs in your browser; nothing is sent anywhere.
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Result
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Answer
5 mi is 8.0467 km. 1 mi = 1.609344 km exactly (the international mile).
Formula
km = miles × 1.609344
Take 5 mi. km = miles × 1.609344 gives 8.0467 km. Going back: 8.0467 km converts back to 5 mi.
Quick estimate: multiply miles by 1.6, or add half and a tenth.
Miles to km table (1 to 100)
| Miles (mi) | Kilometres (km) |
|---|---|
| 1 | 1.6093 |
| 2 | 3.2187 |
| 3 | 4.828 |
| 4 | 6.4374 |
| 5 | 8.0467 |
| 6 | 9.6561 |
| 7 | 11.2654 |
| 8 | 12.8748 |
| 9 | 14.4841 |
| 10 | 16.0934 |
| 15 | 24.1402 |
| 20 | 32.1869 |
| 25 | 40.2336 |
| 30 | 48.2803 |
| 40 | 64.3738 |
| 50 | 80.4672 |
| 60 | 96.5606 |
| 70 | 112.6541 |
| 75 | 120.7008 |
| 80 | 128.7475 |
| 90 | 144.841 |
| 100 | 160.9344 |
Examples
- 1 mi = 1.6093 km
- 5 mi = 8.0467 km
- 10 mi = 16.0934 km
- 26.2 mi = 42.1648 km
Source
Conversion factors and formulas: NIST SP 811, Appendix B.8: mile to kilometer, 1.609 344 E+00; NIST Handbook 44 (2026), Appendix C: 1 international mile = 1.609 344 km. Retrieved 2026-10. Results are rounded for display to 4 decimal places; the arithmetic itself is not rounded.
FAQ
How many kilometres are in 1 mile?
1 mi is 1.609344 km. 1 mi = 1.609344 km exactly (the international mile).
What is the formula to convert miles to kilometres?
km = miles × 1.609344. For 5 mi that gives 8.0467 km.
Is the conversion factor exact?
Yes for the stated definition. 1 mi = 1.609344 km exactly (the international mile). The tool shows results rounded to four decimal places; the underlying arithmetic is not rounded.
How do I estimate it in my head?
Quick estimate: multiply miles by 1.6, or add half and a tenth. Use the exact factor when accuracy matters.
What is 10 mi in kilometres?
10 mi is 16.0934 km.
Disclaimer
Informational arithmetic using the published factors above. For legal-for-trade, engineering or medical use, check against the governing standard.