The foot per second (plural feet per second) is a unit of both speed (scalar) and velocity (vector quantity, which includes direction).[1] It expresses the distance in feet (ft) traveled or displaced, divided by the time in seconds (s).[2] The corresponding unit in the International System of Units (SI) is the meter per second.
Abbreviations include ft/s, fps, and the scientific notation ft s−1.[1]
| m/s | km/h | mph (mi/h) | knot | fps (ft/s) | |
|---|---|---|---|---|---|
| 1 m/s = | 1 | 3.600000 | 2.236936* | 1.943844* | 3.280840* |
| 1 km/h = | 0.277778* | 1 | 0.621371* | 0.539957* | 0.911344* |
| 1 mph (mi/h) = | 0.44704 | 1.609344 | 1 | 0.868976* | 1.466667* |
| 1 knot = | 0.514444* | 1.852 | 1.150779* | 1 | 1.687810* |
| 1 fps (ft/s) = | 0.3048 | 1.09728 | 0.681818* | 0.592484* | 1 |
(* = approximate values)