Miles to Kilometres
Convert miles to kilometres (mi to km). 1 mi = 1.609344 km. Use the calculator, formula and conversion table.
How to convert miles to kilometres
Multiply the amount in miles by 1.609344 to get kilometres. The displayed factor and results are rounded to 12 significant digits.
km = mi × 1.609344Worked example
1 mi = 1.609344 km. Change the amount in the calculator above to use your own value.
Units and assumptions
Uses international metric and imperial definitions. One inch is exactly 0.0254 metres; one foot is 12 inches. These are lengths, rather than areas or volumes.
Calculator results use floating-point arithmetic and are rounded for display. The reference table below uses up to 12 significant digits.
Miles to Kilometres table
| Miles (mi) | Kilometres (km) |
|---|---|
| 0 | 0 |
| 1 | 1.609344 |
| 5 | 8.04672 |
| 10 | 16.09344 |
| 25 | 40.2336 |
| 100 | 160.9344 |
| 1,000 | 1,609.344 |
About this conversion
What is the formula for miles to kilometres?
km = mi × 1.609344. Multiply the amount in miles by 1.609344 to get kilometres. The displayed factor and results are rounded to 12 significant digits.
How do I convert back to miles?
Use the kilometres to miles calculator to reverse this conversion. You can also use Swap units in the calculator above.
Can I use a different pair of units?
Choose another unit in the calculator, or open the length converter to browse all supported pairs.