Mph to km/h Online Converter

This online calculator converts speed from miles per hour (mph) to kilometers per hour (km/h). Miles per hour is primarily used in the United States and a few other countries, while kilometers per hour is the standard speed unit worldwide.

Miles per Hour (mph) to Kilometers per Hour (km/h) Converter

Enter a value in miles per hour and press the button

Miles per Hour (mph)

Result in Kilometers per Hour (km/h)

Swap

Calculation process will appear here.

Decimal Places

How to Use the Tool

Enter Speed in mph: Type the speed value in miles per hour.
Click Convert: Press the conversion button to get the equivalent speed in kilometers per hour.
View Result: The converted value appears immediately.
Adjust Decimal Places: Modify the decimal precision if necessary.
Copy Result: Click the copy button to save the result for use elsewhere.
Clear Fields: Reset all input fields with the clear button.

Measurement Units Explained

Miles per Hour (mph)

Miles per hour (mph) is a unit of speed commonly used in the United States, the United Kingdom, and a few other countries. It measures the number of miles traveled in one hour. The symbol for miles per hour is “mph”.

1 mph = 1.60934 km/h

Kilometers per Hour (km/h)

Kilometers per hour (km/h) is the most widely used unit of speed measurement globally. It defines how many kilometers are traveled in one hour. The symbol for kilometers per hour is “km/h”.

1 km/h = 0.621371 mph