Miles Per Hour to Feet Per Second
Type a value in either box to convert between miles per hour and feet per second. The factor is 1.46667.
| Miles Per Hour | Feet Per Second |
|---|---|
| 1 mph | 1.466667 ft/s |
| 2 mph | 2.933333 ft/s |
| 3 mph | 4.4 ft/s |
| 5 mph | 7.333333 ft/s |
| 10 mph | 14.666667 ft/s |
| 25 mph | 36.666667 ft/s |
| 50 mph | 73.333333 ft/s |
| 100 mph | 146.666667 ft/s |
How to use
- Enter a value in the Miles Per Hour field.
- The Feet Per Second figure appears immediately — no button to press.
- Typing in the Feet Per Second field converts back to Miles Per Hour the same way.
- Use the reference table for the values that come up most often.
Miles Per Hour to Feet Per Second formula
To convert miles per hour to feet per second, multiply by 1.46666667.
ft/s = mph × 1.46666667
Put another way, one mile per hour is exactly 22/15 feet per second.
Why this factor: the mile per hour and the foot per second are both defined against the meter per second, so dividing one definition by the other gives 1.46666667 directly. Both definitions are set out in full below.
To go the other way, divide by 1.46666667 — or use the Feet Per Second to Miles Per Hour converter, which is the same calculation reversed.
Worked example
Given 60 mph, multiplying by 1.46666667 yields 88 ft/s.
60 mph × 1.46666667 = 88 ft/s
The converter above does this for any value you type, in either direction.
What is a mile per hour?
Miles per hour is the road speed unit of the United States and the United Kingdom.
Definition: Exactly 0.44704 meters per second, following from the exact 1,609.344 m mile.
Where it is used: US and UK speed limits and speedometers, plus baseball pitch and tennis serve speeds.
What is a foot per second?
Feet per second is a US engineering speed unit, common where distances are short.
Definition: Exactly 0.3048 meter per second, following from the exact definition of the foot.
Where it is used: Ballistics and muzzle velocities, fluid flow in pipes, and conveyor speeds in the US.
Miles Per Hour vs Feet Per Second
The mile per hour and the foot per second belong to the same family of units, so converting between them is usually a matter of shifting a decimal point or applying a small whole-number factor.
Frequently asked questions
How many feet per second are in a mile per hour?
One mile per hour equals 1.46666667 feet per second.
What is the formula to convert miles per hour to feet per second?
Multiply the number of miles per hour by 1.46666667. To reverse it, divide by 1.46666667 instead.
How do I convert feet per second back to miles per hour?
Divide by 1.46666667, which is the same as multiplying by 0.681818182.
How many feet per second are in 10 miles per hour?
10 mph works out to 14.666667 ft/s.
How is the mile per hour defined?
Exactly 0.44704 meters per second, following from the exact 1,609.344 m mile.