Miles per hour (abbreviated mph) is a unit of speed, expressing the number of statute miles covered in one hour. Although the term “miles per hour” is mostly used to describe automobile speeds in the United States, it has been adopted by other English-speaking countries around the world, including Canada and the United Kingdom.
The most commonly used unit of speed is miles per hour (MPH). When used alone, it generally refers to a vehicle’s airspeed when cruising at altitude on level ground and at sea level. However, in popular usage, it also refers to any kind of ground speed that can be obtained by a road vehicle or aircraft. Miles per hour has been used as an expression of speed since at least 1826 in America, when it was applied to steamboats.
Miles per mile (commonly abbreviated as “mph”) is an alternative unit of speed that expresses an amount known as “miles per hour.” Miles per hour are used for measuring both land and air speeds.
Last modified: November 10, 2022