Miles per hour to Feet per second Converter

Use this converter to easily convert between Miles per hour and Feet per second (mph to fps).

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How many Feet per second equal one Mile per hour?

Since by definition 5280 feet equal one mile, and an hour has 3600 seconds, through simple calculation we can reach the conclusion that 1.466667 feet per second equal one mile per hour (5280/3600). Historically, the mile varied in length, until it was fixed with an international treaty in 1959. The internationally recognized symbol for miles is "mi" and for feet is "ft". Still, in some places in the US and the UK "m" is used to denote miles, which can lead to confusion with the SI unit "m", which stands for meter. The result is that "mph" and "fps" are used commonly as symbols for these speed measurement units.

Difference between Miles per hour and Feet per second

The mile is a unit for measuring distances, while feet are used to measure small distances, such as the dimensions of a house, yard, football or baseball field - anywhere where greater precision is required. Due to this last part, feet per second is preferred when greater accuracy is required, while miles per hour is used in everyday talk, e.g. for the speed of a vehicle such as a car, truck, train or plane. Both units are a part of the imperial unit system which is used primarily in the United States and the United Kingdom.

Historically, the foot is an older metric compared to the mile, its existence hard to trace to an origin. The mile is also quite old, for example in the Roman Empire there was the Roman mile, equal to 5,000 feet. It had different definitions through time and depending on the country and location, e.g. English mile, Irish mile, Italian mile. Nowadays both metrics are defined relative to the meter, so they are essentially alternative inconvenient units in the metric system.

How to convert Miles per hour to Feet per second

When converting units of speed, both the length dimension and the time dimension need to be converted. First, to convert miles to feet, we multiply the distance in miles by 5280 to get the equivalent in feet. Then, to convert hours to seconds we divide by 3600 (the number of seconds in an hour). To convert from mph to fps we combine the two operations, therefore we can say we multiply by 5280/3600, or about 1.466667. The conversion can be done with a calculator, or use our online miles per hour to feet per second converter above.

Miles per hour to Foot per second conversion example

Sample task: convert 30 miles per hour to feet per second. Solution:

mph * 1.466667 = fps
30 mph * 1.4667 = 44.000010 fps
End result:
30 mph is equal to 44.000010 fps

mph to fps conversion table

mph to fps conversion table
mph fps
1 mph 1.466667 fps
2 mph 2.933333 fps
3 mph 4.40 fps
4 mph 5.866667 fps
5 mph 7.333333 fps
6 mph 8.80 fps
7 mph 10.266667 fps
8 mph 11.733333 fps
9 mph 13.20 fps
10 mph 14.666667 fps
20 mph 29.333333 fps
30 mph 44 fps
40 mph 58.666667 fps
50 mph 73.333333 fps
60 mph 88 fps
70 mph 102.666667 fps
80 mph 117.333333 fps
90 mph 132 fps
100 mph 146.666667 fps
200 mph 293.333333 fps
300 mph 440 fps
400 mph 586.666667 fps
500 mph 733.333333 fps
600 mph 880 fps
700 mph 1,026.666667 fps
800 mph 1,173.333333 fps
900 mph 1,320 fps
1,000 mph 1,466.666667 fps


[1] NIST Special Publication 330 (2008) - "The International System of Units (SI)", edited by Barry N.Taylor and Ambler Thompson

[2] International Organization for Standardization (1993). ISO Standards Handbook: Quantities and units (3rd edition). Geneva: ISO. ISBN 92-67-10185-4.

Cite this converter & page

If you'd like to cite this online converter resource and information as provided on the page, you can use the following citation:
Georgiev G.Z., "Mph to Fps Converter", [online] Available at: URL [Accessed Date: 21 Jul, 2019].