Miles per hour

Miles per hour
1974 MG MGB GT - Flickr - The Car Spy (14).jpg
Automobile speedometer, indicating speed in miles per hour
General information
Unit systemImperial, United States customary units
Unit ofspeed
1 mph in ...... is equal to ...
   km/h   1.609344
   m/s   0.44704
   knot   0.868976
   ft/s   1.467

Miles per hour (abbreviated mph, MPH or mi/h) is an imperial and United States customary unit of speed expressing the number of statute miles covered in one hour. It is used in the United States, United Kingdom and many Commonwealth nations, particularly in the Caribbean region.


65 mph speed limit sign in the United States
50 mph speed limit sign in the United Kingdom

Road traffic

Speed limits and road traffic speeds are given in miles per hour in the following jurisdictions (elsewhere kilometers per hour are used):

Road traffic speeds in other countries are indicated in kilometres per hour, while occasionally both systems are used. For example, in Ireland, a judge considered a speeding case by examining speeds in both kilometres per hour and miles per hour. The judge was quoted as saying the speed seemed "very excessive" at 180 km/h but did not look "as bad" at 112 mph; a reduced fine was still imposed on the speeding driver.[21]

Rail networks

Miles per hour is the unit also used in the Canadian rail system,[22] which uses km/h on roads.

Nautical and aeronautical usage

Nautical and aeronautical applications favour the knot as a common unit of speed. (One knot is one nautical mile per hour, with a nautical mile being exactly 1,852 meters or about 6,076 feet.)

Other usage

In some countries mph may be used to express the speed of delivery of a ball in sporting events such as cricket, tennis and baseball.

Other Languages
العربية: ميل في الساعة
български: Миля в час
čeština: Míle za hodinu
español: Milla por hora
français: Mille par heure
Bahasa Indonesia: Mil per jam
italiano: Miglio orario
македонски: Милји на час
Bahasa Melayu: Batu sejam
Nederlands: Mijl per uur
日本語: マイル毎時
norsk: Mph
português: Milha por hora
русский: Миля в час
sicilianu: Migghiu orariu
Simple English: Miles per hour
Türkçe: Mil bölü saat
українська: Миля за годину
Tiếng Việt: Dặm trên giờ
粵語: 哩每小時