Length converter
Convert metres, feet, inches and more.
Open toolMiles per hour to Kilometres per hour
Convert miles per hour (mph) to kilometres per hour (km/h) with a copyable result.
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THE QUICK GUIDE
How to use miles per hour to kilometres per hour
Enter a value in miles per hour, choose your display precision, and select Convert. Use Swap units to calculate the reverse direction.
How it works
Speed conversion: multiply the value in mph by 1.609344 to obtain km/h. Both units are related through metres per second.
A useful example
1 mph = 1.609344 km/h.
Good to know
Uses speed units as labelled. Floating-point arithmetic is approximate; results show up to 12 significant digits. Very large or small results use scientific notation.