# Miles per hour

Last updated
miles per hour
Automobile speedometer, indicating speed in miles per hour
General information
Unit system Imperial, United States customary units
Unit of speed
Symbolmph
Conversions
1 mph in ...... is equal to ...
km/h    1.609344
0.44704
kn    0.868976
ft/s    1.467

Miles per hour (mph, MPH or mi/h) is a British imperial and United States customary unit of speed expressing the number of statute miles covered 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

### Road traffic

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

### Rail networks

Miles per hour is the unit also used in the Canadian rail system. [32]

### 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 = 0.44704  m/s (exactly) = 1.609344  km/h (exactly) ≈ 1.467  ft/s (approximately) ≈ 0.868976  kn
Conversions between common units of speed
m/s km/h mph knot ft/s
1 m/s =13.62.236936*1.943844*3.280840*
1 km/h =0.277778*10.621371*0.539957*0.911344*
1 mph =0.447041.60934410.868976*1.466667*
1 knot =0.514444*1.8521.150779*11.687810*
1 ft/s =0.30481.097280.681818*0.592484*1

(* = approximate values)

## Related Research Articles

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