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Speed
Miles per hour to Feet per second
Convert miles per hour (mph) to feet per second (ft/s). Type a value below to see the result update instantly. Reference table and formula included.
Calculator
1 mph = 1.4667 ft/s
Miles per hour to Feet per second Conversion Table
Common values, ready to copy:
| miles per hour | feet per second |
|---|---|
| 1 mph | 1.4667 ft/s |
| 2 mph | 2.9333 ft/s |
| 5 mph | 7.3333 ft/s |
| 10 mph | 14.6667 ft/s |
| 25 mph | 36.6667 ft/s |
| 50 mph | 73.3333 ft/s |
| 100 mph | 146.67 ft/s |
| 1,000 mph | 1466.67 ft/s |
Formula
feet per second = miles per hour × 1.46666667e+0
Speed is distance per unit time. 1 m/s = 3.6 km/h. 1 mph = 1.609344 km/h. 1 knot = 1.852 km/h (one nautical mile per hour).
About Miles per hour and Feet per second
Miles per hour (mph): Derived from the mile (1,609.344 m exactly) and the hour; conventional speed unit in the US, UK, and a handful of other countries. Common uses: US road speed limits, US sports speeds (baseball pitches in mph), UK road signs, and most US vehicle dashboards.
Feet per second (ft/s): Imperial-system speed unit, occasionally used in US engineering and scientific contexts. Common uses: Ballistics (bullet velocities), some sports analytics (US football, baseball pitch tracking), and certain physics calculations in US-derived sources.
How the conversion works
Speed is distance per unit time. 1 m/s = 3.6 km/h. 1 mph = 1.609344 km/h. 1 knot = 1.852 km/h (one nautical mile per hour).
The exact relationship is feet per second = miles per hour × 1.46666667e+0, which the calculator at the top of this page applies in both directions. Type into either field and the other updates immediately.
When this conversion matters
Converting between miles per hour and feet per second comes up wherever speed measurements move between systems — from one country's conventions to another's, from a scientific reference to a practical specification, or from one industry's working unit to another's. The calculator and reference table above cover the everyday range; for unusual values you can type any number into either field.