How to use it
- Type the number of Miles in the first field.
- Read the result in Kilometers. You can also type in the Kilometers field to convert the other way.
- Use the table of common values, or copy the result with one click.
How it works
Formula: km = mi × 1.609344
1 mi = 1.609344 km, and 1 km = 0.621371 mi.
Results use the exact definitions of both units. The page shows up to 6 decimal places; copy the value for full precision.
Examples
1 mi in km
1 mi = 1.609344 km, using km = mi × 1.609344.
5 mi in km
5 mi = 8.04672 km, using km = mi × 1.609344.
10 mi in km
10 mi = 16.09344 km, using km = mi × 1.609344.
Frequently asked questions
How do I convert Miles to Kilometers?
Use the formula km = mi × 1.609344. For example, 1 mi = 1.609344 km.
How do I convert Kilometers back to Miles?
Use the reverse formula mi = km × 0.62137119. For example, 1 km = 0.621371 mi.
How accurate is this converter?
It uses the exact legal definitions of the units, so the only rounding is in the number of decimals shown. Copy the result to get the full value.
Privacy
The conversion runs entirely in your browser. Nothing you type is sent anywhere.