Definition: Miles per hour is a unit of speed expressing the number of miles traveled in one hour.
History/origin: Common in the Imperial system, especially in the United States and the United Kingdom.
Current use: mph is standard for speed limits and vehicle speed in several countries.
Definition: Feet per second is a unit of speed expressing the number of feet traveled in one second.
History/origin: Commonly used in the United States, especially in physics and engineering contexts.
Current use: ft/s is often used in ballistics, aviation, and some engineering fields.
| Miles per Hour (mph) | Feet per Second (ft/s) |
|---|---|
| 1.000 | 1.467 |
| 5.000 | 7.333 |
| 10.000 | 14.667 |
| 15.000 | 22.000 |
| 20.000 | 29.333 |
| 25.000 | 36.667 |
| 0.500 | 0.733 |
| 2.500 | 3.667 |
| 30.200 | 44.293 |
| 100.000 | 146.667 |
1 mile per hour ≈ 1.46667 feet per second
Example: convert 20.4545 mph to ft/s:
20.4545 ÷ 0.681818 = 30 ft/s