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Speed
Kilometers per hour to Feet per second
Convert kilometers per hour (km/h) to feet per second (ft/s). Type a value below to see the result update instantly. Reference table and formula included.
Calculator
1 km/h = 0.911345 ft/s
Kilometers per hour to Feet per second Conversion Table
Common values, ready to copy:
| kilometers per hour | feet per second |
|---|---|
| 1 km/h | 0.911345 ft/s |
| 2 km/h | 1.8227 ft/s |
| 5 km/h | 4.5567 ft/s |
| 10 km/h | 9.1135 ft/s |
| 25 km/h | 22.7836 ft/s |
| 50 km/h | 45.5673 ft/s |
| 100 km/h | 91.1345 ft/s |
| 1,000 km/h | 911.35 ft/s |
Formula
feet per second = kilometers per hour × 9.11345144e-1
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 Kilometers per hour and Feet per second
Kilometers per hour (km/h): A practical unit derived from the kilometer (defined via the meter) and the hour (60 × 60 seconds). Common uses: Vehicle speed limits worldwide except in the US and a few other countries, train and aircraft cruise speeds (in metric contexts), and weather wind speeds.
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 = kilometers per hour × 9.11345144e-1, 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 kilometers 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.