Convert miles to kilometers instantly. Enter a value below, or use the formula and reference table further down the page.
In practice
Mile-to-kilometer conversion is essential for driving distances, running/cycling routes, and speed limits when moving between the US/UK and the rest of the world. The exact figure is 1 mile = 1.609344 km, a precisely defined value, not an approximation. Road signs are the place this matters most practically — a US highway speed limit of 65 mph converts to just over 104 km/h, which is why renting a car abroad (or driving into Canada from the US) means recalibrating your sense of what a given number on the dash actually means.
How to convert miles to kilometers
Multiply the value by 1.609344.
km = mi × 1.609344Example: 10 mi = 16.0934 km.
Miles to Kilometers conversion table
| Miles (mi) | Kilometers (km) |
|---|---|
| 1 mi | 1.6093 km |
| 2 mi | 3.2187 km |
| 3 mi | 4.828 km |
| 4 mi | 6.4374 km |
| 5 mi | 8.0467 km |
| 10 mi | 16.0934 km |
| 15 mi | 24.1402 km |
| 20 mi | 32.1869 km |
| 25 mi | 40.2336 km |
| 50 mi | 80.4672 km |
| 100 mi | 160.9344 km |
Frequently asked questions
How many kilometers is 1 mile?
1 mile equals 1.6093 kilometers.
What is the formula to convert mi to km?
To convert mi to km, multiply the value by 1.609344. The full formula is: km = mi × 1.609344.
How do I convert kilometers back to miles?
Use the same calculator above and type your value into the kilometers field instead — it converts in both directions. Or use the reverse formula: mi = km ÷ 1.609344.
Is the mi to km conversion exact?
The conversion factor used here (1.609344) is the standard internationally defined value. Results on this page are rounded to four decimal places for readability.