mph to feet per second – convert miles per hour to fps
Convert miles per hour to feet per second (mph to fps) to turn road-style speeds into per-second measurements for physics, ballistics and engineering. This page opens the main speed converter with mph → fps pre-selected.
Open the interactive mph → fps converter:
Use main converter (mph → fps) or switch to fps → mphThe speed converter also supports km/h, m/s and knots for motoring, aviation and physics calculations.
Quick reference: mph to feet per second
One mile per hour is about 1.46667 feet per second. So: fps = mph × 1.46667. Examples:
| Speed (mph) | Speed (fps, approx.) |
|---|---|
| 10 mph | 14.7 fps |
| 20 mph | 29.3 fps |
| 30 mph | 44.0 fps |
| 60 mph | 88.0 fps |
| 80 mph | 117.3 fps |
| 100 mph | 146.7 fps |
Why convert mph to feet per second?
mph to fps is useful when you:
- Analyse projectile or ball speeds measured in fps but think in mph.
- Compare vehicle speeds with machinery or conveyor speeds expressed per second.
- Work through physics problems using imperial units of distance and time.
- Design safety barriers or stopping distances where impact speed matters.
Other speed converters on this site
Values here are rounded for readability. The converter uses the exact relationships between miles, feet, hours and seconds for precise work.
Page last updated: 4 December 2025.