Convert mph to fps
Convert mph to fps instantly. 1 mph = 1.466667 ft/s. Formula, worked examples and a quick reference table.
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One mile per hour equals 1.466667 feet per second. To convert any number of miles per hour to feet per second, multiply by 1.46666667.
The converter above works in both directions and updates as you type. Below you will find the formula, a worked example and a reference table of common values.
Speed conversions divide by audience. Road speeds move between kilometres and miles per hour and are what a driver or a runner needs. Metres per second is what every equation of motion expects, so it is the form any physics problem has to reach. Knots belong to the sea and the air, where one knot is one nautical mile per hour and a nautical mile is one minute of latitude — a system built around navigation rather than around convenience.
mph to fps formula
To go the other way, use mile per hour = foot per second ÷ 1.46666667.
About these units
Miles per hour remains the road-speed unit in the United States and the United Kingdom, which is why British road signs are in miles while everything else on them is metric.
Feet per second is the speed unit of US ballistics and of some engineering fields, where the numbers land in a more readable range than miles per hour.
Mile per hour is also written miles per hour and mi/h. Foot per second is also written feet per second and fps.
Sources
mph to fps conversion table
| Mile per hour | Foot per second |
|---|---|
| 1 mph | 1.4667 ft/s |
| 2 mph | 2.9333 ft/s |
| 3 mph | 4.4 ft/s |
| 5 mph | 7.3333 ft/s |
| 10 mph | 14.6667 ft/s |
| 20 mph | 29.3333 ft/s |
| 25 mph | 36.6667 ft/s |
| 50 mph | 73.3333 ft/s |
| 100 mph | 146.6667 ft/s |
| 250 mph | 366.6667 ft/s |
| 500 mph | 733.3333 ft/s |
| 1,000 mph | 1,466.6667 ft/s |
Frequently asked questions
How many feet per second are in a mile per hour? +
There are 1.466667 feet per second in one mile per hour.
What is 10 mph in ft/s? +
10 mph equals 14.6667 ft/s. Multiply 10 by 1.46666667.
How do I convert foot per second back to mile per hour? +
Use mile per hour = foot per second ÷ 1.46666667. The converter above handles both directions, or see our dedicated fps to mph page.
How accurate is this mile per hour to foot per second conversion? +
The factor used is 1.4666666667, carried at full double precision. Where a unit has an exact legal definition the factor is exact rather than approximate. Rounding is applied only to the displayed result, so the answer is never a calculation done on an already-rounded number.
Is there a quick way to estimate mph to ft/s in my head? +
Round the factor to 1.47 and multiply. That is 0.2273% off the exact value of 1.466667, which is fine for a rough figure and not for anything that has to balance.