Tools · FPS to MPH
FPS to MPH Converter
Enter a value in feet per second, see the equivalent in miles per hour. The unit physics classes, ballistics tables, and radar guns use, converted to the speed you read on a car dial.
1 fps = 0.681818 mph · 1 mph = 1.46667 fps · 88 fps = exactly 60 mph
Where feet per second shows up
Feet per second is the everyday unit of physics problems and American engineering: it is what you get when you measure distance in feet and time in seconds, with no unit conversion buried inside. A falling object accelerates at 32.2 feet per second squared. A baseball leaves a fast pitcher's hand near 140 fps. A rifle bullet leaves the muzzle at 2,000 to 3,000 fps.
The clean relationship worth memorizing is 88 fps = 60 mph, because 60 mph is 88 feet every second, or one mile every 60 seconds. That is why 88 shows up so often in stopping-distance and reaction-time math: at 60 mph you cover nearly a full car length in the quarter second it takes to move your foot to the brake. Radar and lidar guns measure in feet per second internally, then display mph.
FPS to MPH reference
| Feet per second | MPH |
|---|---|
| 1 | 0.68 |
| 5 | 3.41 |
| 10 | 6.82 |
| 15 | 10.23 |
| 20 | 13.64 |
| 25 | 17.05 |
| 30 | 20.45 |
| 40 | 27.27 |
| 50 | 34.09 |
| 60 | 40.91 |
| 88 | 60.00 |
| 100 | 68.18 |
| 150 | 102.27 |
Related converters
- m/s to MPH — the metric equivalent, meters per second.
- Mach to MPH — for supersonic figures.
- Stopping distance calculator — reaction and braking distance at any speed.
- Live GPS speedometer — read your real speed in the browser.