It is the abbreviation of miles per hour, and it is the unit of speed measurement, which means miles per hour. It is commonly known as "Mai", 1 Mai =1.444 km/h.

Usually used in Britain, former British colonies (such as the United States) and Commonwealth countries to calculate speed, road speed limit, tennis serve speed and so on. It is also used to calculate the central wind speed of tropical cyclones.

Km means kilometers, and mph is commonly known as "miles". Because China's automobile industry started late, especially in the early days of the founding of the People's Republic of China, foreign cars have always been in power, and most of them take miles per hour as the counting unit of speed and odometer.

So everyone has always been used to reading "mile" as a unit of speed, which means "mile" abroad. Actually, the uniform speed unit in the world (including China) is "km/h", but the distance between 1 km and 1 mile is different, 1 mile = 1.609 km.

Extended data:

Unit conversion:

1, conversion relation

1 mile/hour = 1.609344 km/hour,

1 km/h = 0.62 137 12 mph.

2. Conversion results

1 mile/hour equals:

0.44704m/s, international unit guidance unit.

1.609344 km/h

22/ 15 = 1.4667 feet per second.

About 0.868976 knots

Baidu encyclopedia -mph