Foot per second

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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, or sec).[2] The corresponding unit in the International System of Units (SI) is the metre per second.

Abbreviations include ft/s, ft/sec and fps, and the scientific notation ft s−1.[1]


Conversions between common units of speed
m/s km/h mph knot ft/s
1 m/s = 1 3.6 2.236936 1.943844 3.280840
1 km/h = 0.277778 1 0.621371 0.539957 0.911344
1 mph = 0.44704 1.609344 1 0.868976 1.466667
1 knot = 0.514444 1.852 1.150779 1 1.687810
1 ft/s = 0.3048 1.09728 0.681818 0.592484 1

(Values in bold face are exact.)

See also


  1. ^ a b "What is foot per second (ft/s or ft/sec)? - Definition from".
  2. ^ "What is a speed unit foot per second (ft/sec)?". Aqua-Calc. Retrieved 2018-06-02.

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