Miles per Hour to Kilometers per Hour
Convert mph to km/h instantly — free, no sign-up.
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About the Miles per Hour (mph)
The Miles per Hour is the standard speed unit for road travel in the US and UK.
About the Kilometers per Hour (km/h)
The Kilometers per Hour is the standard speed unit for road travel across most of the world.
How to convert mph to km/h
- Enter the value in mph in the box above.
- The km/h equivalent updates instantly.
- Use the swap button to convert km/h back to mph just as easily.