Mile per hour [m/h] to Kilometre per hour [km/h] Converter

Definition: Mile per hour (m/h or mph) is a unit of speed, expressing the number of miles travelled in one hour. It is commonly used for measuring the speed of vehicles, especially in countries that use the imperial system, such as the United States and the United Kingdom.

History/origin: Mile per hour is derived from the imperial system of measurement, based on the mile as a unit of distance and the hour as a unit of time. It is historically tied to the British Empire and its influence.

Current use: Mph is widely used in road signage, vehicle speedometers, and everyday conversation about speed in countries like the US and UK. It is also used in weather reports and sports, such as baseball, to describe the speed of a thrown ball.

Definition: Kilometre per hour (km/h) is a unit of speed, expressing the number of kilometres travelled in one hour. It is commonly used for measuring the speed of vehicles, especially in countries that use the metric system.

History/origin: Kilometre per hour is derived from the metric system, based on the kilometre as a unit of distance and the hour as a unit of time. It became popular as countries adopted the metric system for standardization.

Current use: Km/h is widely used in road signage, vehicle speedometers, and weather reports in many countries. It is a practical unit for expressing speeds within a human-scale context, such as driving or cycling.