How many mph in 1 km/h?
The answer is 0.621371192237.

We assume you are converting between **mile/hour** and **kilometre/hour**.

You can view more details on each measurement unit:

mph or
km/h

The SI derived unit for **speed** is the meter/second.

1 meter/second is equal to 2.23693629205 mph, or 3.6 km/h.

Note that rounding errors may occur, so always check the results.

Use this page to learn how to convert between miles/hour and kilometers/hour.

Type in your own numbers in the form to convert the units!

You can do the reverse unit conversion from km/h to mph, or enter any two units below:

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Miles per hour is a unit of speed, expressing the number of international miles covered per hour. It is commonly abbreviated in everyday use in the United States, the United Kingdom, and elsewhere to mph or MPH, although mi/h is sometimes used in technical publications.

The kilometre per hour (American English: kilometer per hour) is a unit of both speed (scalar) and velocity (vector).

The km/h is the worldwide most commonly used speed unit on road signs and car speedometers.

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