Miles per hour
| Miles per hour | |
|---|---|
 Automobile speedometer, indicating speed in miles per hour | |
| General information | |
| Unit system | Imperial, United States customary units |
| Unit of | speed |
| Symbol | mph |
| Conversions | |
| 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.
Contents
1 Usage
1.1 Road traffic
1.2 Rail networks
1.3 Nautical and aeronautical usage
1.4 Other usage
2 Conversions
3 See also
4 References
Usage
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):
- Antigua & Barbuda
The Bahamas[1]
Belize[2]
Dominica[3]
Grenada[4]
St. Kitts & Nevis,[5]
St. Lucia[6]
St. Vincent & the Grenadines[7]
Samoa[8]
- United Kingdom[9]
- The following British Overseas Territories:
British Virgin Islands[10]
Cayman Islands[11]
Falkland Islands[12]
Saint Helena, Ascension and Tristan da Cunha[13]
Turks & Caicos Islands[14]
- The Crown dependencies:
- Guernsey
- Isle of Man
- Jersey
- United States[15]
- The following United States overseas dependencies:
American Samoa[16]
Guam[17]
Northern Mariana Islands[18]
- Puerto Rico
U.S. Virgin Islands[19][20]
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.
Conversions
1 mph
= 6999447040000000000♠0.44704 m/s (exactly)
= 6999447040000000000♠1.609344 km/h (exactly)
≈ 1.467 ft/s (approximately)
≈ 6999447039875555555♠0.868976 kn
| m/s | km/h | mph | knot | ft/s | |
|---|---|---|---|---|---|
| 1 m/s = | 1 | 3.6 | 7000223693600000000♠2.236936 | 7000194384400000000♠1.943844 | 7000328084000000000♠3.280840 |
| 1 km/h = | 6999277778000000000♠0.277778 | 1 | 6999621371000000000♠0.621371 | 6999539957000000000♠0.539957 | 6999911344000000000♠0.911344 |
| 1 mph = | 6999447040000000000♠0.44704 | 7000160934400000000♠1.609344 | 1 | 6999868976000000000♠0.868976 | 7000146666700000000♠1.466667 |
| 1 knot = | 6999514444000000000♠0.514444 | 1.852 | 7000115077900000000♠1.150779 | 1 | 7000168781000000000♠1.687810 |
| 1 ft/s = | 6999304800000000000♠0.3048 | 7000109728000000000♠1.09728 | 6999681818000000000♠0.681818 | 6999592484000000000♠0.592484 | 1 |
(Values in bold face are exact.)
See also
- Acceleration
- Velocity
References
^ "The Nassau Guardian". The Nassau Guardian. Archived from the original on 2014-02-26. Retrieved 2014-08-21..mw-parser-output cite.citation{font-style:inherit}.mw-parser-output .citation q{quotes:"""""""'""'"}.mw-parser-output .citation .cs1-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/6/65/Lock-green.svg/9px-Lock-green.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .citation .cs1-lock-limited a,.mw-parser-output .citation .cs1-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/d/d6/Lock-gray-alt-2.svg/9px-Lock-gray-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .citation .cs1-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/a/aa/Lock-red-alt-2.svg/9px-Lock-red-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration{color:#555}.mw-parser-output .cs1-subscription span,.mw-parser-output .cs1-registration span{border-bottom:1px dotted;cursor:help}.mw-parser-output .cs1-ws-icon a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/4/4c/Wikisource-logo.svg/12px-Wikisource-logo.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output code.cs1-code{color:inherit;background:inherit;border:inherit;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;font-size:100%}.mw-parser-output .cs1-visible-error{font-size:100%}.mw-parser-output .cs1-maint{display:none;color:#33aa33;margin-left:0.3em}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration,.mw-parser-output .cs1-format{font-size:95%}.mw-parser-output .cs1-kern-left,.mw-parser-output .cs1-kern-wl-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right,.mw-parser-output .cs1-kern-wl-right{padding-right:0.2em}
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