Miles per hour

Template:Short description Template:Use dmy dates Template:About Template:Infobox unit Miles per hour (mph, m.p.h., MPH, or mi/h) is a British imperial and United States customary unit of speed expressing the number of miles travelled in one hour. It is used in the United Kingdom, the United States, and a number of smaller countries, most of which are UK or US territories, or have close historical ties with the UK or US.

Usage

Speed limit units on traffic signs around the world: Template:Legend Template:Legend Template:Legend Template:Legend

50 mph speed limit sign in the United Kingdom

65 mph speed limit sign in the United States

Road traffic

Speed limits and road traffic speeds are given in miles per hour in the following jurisdictions:

• Antigua and Barbuda
• Bahamas<ref>Template:Cite web</ref>
• Belize<ref>Template:Cite web</ref>
• Dominica<ref>Template:Cite web</ref>
• Grenada<ref>Template:Cite web</ref>
• Liberia (occasionally)Template:Refn
• Marshall Islands
• Micronesia
• Palau
• Saint Kitts and Nevis<ref>Template:Cite web</ref>
• Saint Lucia<ref>Template:Cite web</ref>
• Saint Vincent and the Grenadines<ref>Template:Cite web</ref>
• United Kingdom<ref>Speed limits Template:Webarchive (UK) Department for Transport. Retrieved 4 August 2015</ref>
• The following British Overseas Territories:
  • Anguilla<ref>Template:Cite web</ref>
  • British Virgin Islands<ref>Template:Cite web</ref><ref>Template:Cite web</ref>
  • British Indian Ocean Territory
  • Cayman Islands<ref>Template:Cite web</ref>
  • Falkland Islands<ref>Template:Cite web</ref>
  • Montserrat
  • Saint Helena, Ascension and Tristan da Cunha<ref>Template:Cite web</ref>
  • Turks and Caicos Islands<ref>Template:Cite web</ref>
• The Crown dependencies:
  • Bailiwick of Guernsey
  • Isle of Man
  • Jersey
• United States<ref name="twsJun15a">Template:Cite magazine</ref>
• The following United States overseas dependencies:
  • American Samoa<ref>Template:Cite web</ref>
  • Guam<ref>Template:Cite web</ref>
  • Northern Mariana Islands<ref>[1] Template:Webarchive</ref>
  • Puerto Rico
  • United States Virgin Islands<ref>Template:Cite web</ref><ref>Template:Cite web</ref>

Rail networks

Miles per hour is the unit used on the US, Canadian and Irish rail systems.<ref name="Classlist">Template:Cite web Archived 25 August 2012.</ref><ref>Template:Cite web</ref><ref>Template:Cite web</ref> Miles per hour is also used on British rail systems, excluding trams, some light metro systems, the Channel Tunnel and High Speed 1.<ref>Template:Cite web</ref>

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 metres 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.

Conversions

1 mph	= Template:Val (exactly)
	= Template:Val (exactly)

See also

• Acceleration
• Kilometres per hour
• Velocity