How to Convert Miles Per Hour to Kilometers Per Hour

How to Convert Miles Per Hour to Kilometers Per Hour

To convert miles per hour (MPH) to kilometers per hour (km/h or KPH) it’s easiest to use this basic formula:

KPH = MPH × 1.609344

One mile per hour is equal to 1.609344 kilometers per hour.

Accordingly, speed in kilometers per hour is equal to the speed in miles per hour multiplied by a factor of 1.609344.

Example

As an example, let’s convert 60 miles per hour to kilometers per hour using the formula above.

60 mph = (60 × 1.609344) = 96.6 km/h

How to Convert Miles Per Hour to Kilometers Per Hour

To convert miles per hour (MPH) to kilometers per hour (KPH), it’s the inverse of the formula above.

MPH = KPH × 0.621

One kilometer per hour is equal to 0.621 miles per hour.

Example

As an example, let’s convert 120 kilometers per hour to miles per hour using the formula above.

120 kph = (120 × 0.621) = 74.6 mph

Miles per hour and kilometers per hour are both used to measure the speed of something.

Let’s take a look at each measurement more closely.

Miles Per Hour

Miles per hour is a speed measurement of speed. It is designed to measure the distance traveled in miles in one hour.

So if a car is traveling 60 mph for one hour, it will travel 60 miles.

Most parts of the world use kilometers per hour as part of the metric system

The mile per hour is common in the US and is an imperial unit of speed.

Miles per hour is typically abbreviated as mph. Sometimes it is also abbreviated as MPH or mi/h.

For instance, 1 mile per hour can be expressed as 1 mph, 1 MPH, or 1 mi/h.

Many prefer to simply write mph or MPH to avoid using the slash (/) or solidus line that indicates division.

Miles per hour can be shown using the following formula:

v_mph = d_mit_hr

Miles per hour, expressed as an average velocity, is equal to the distance in miles divided by the time in hours.

So if a car traveled 700 miles in one day over 12 hours of driving, it’s average velocity is 700/12 or about 58 mph.

Kilometers Per Hour

Kilometers per hour measures speed, showing the distance traveled in kilometers in one hour.

The kilometer per hour, or kilometre per hour, is an SI unit of speed in the metric system.

Kilometers per hour is often abbreviated as km/h, and sometimes also shown as kph.

For example, 1 kilometer per hour can be written as 1 km/h, 1 kph or 1 KPH.

Kilometers per hour can be expressed using the formula:

v_km/h = d_kmt_hr

The velocity in kilometers per hour is equal to the distance in kilometers divided by time in hours.

Miles Per Hour (MPH) to Kilometer Per Hour (KPH) Conversion Table

Below we have a conversion table to translate common MPH markings to KPH.