Kilometers Per Hour to Feet Per Second
Type a value in either box to convert between kilometers per hour and feet per second. The factor is 0.911344.
| Kilometers Per Hour | Feet Per Second |
|---|---|
| 1 km/h | 0.911344 ft/s |
| 2 km/h | 1.822689 ft/s |
| 3 km/h | 2.734033 ft/s |
| 5 km/h | 4.556722 ft/s |
| 10 km/h | 9.113444 ft/s |
| 25 km/h | 22.78361 ft/s |
| 50 km/h | 45.567221 ft/s |
| 100 km/h | 91.134442 ft/s |
How to use
- Enter a value in the Kilometers Per Hour field.
- The Feet Per Second figure appears immediately — no button to press.
- Typing in the Feet Per Second field converts back to Kilometers Per Hour the same way.
- Use the reference table for the values that come up most often.
Kilometers Per Hour to Feet Per Second formula
The factor from kilometers per hour to feet per second is 0.911344415.
ft/s = km/h × 0.911344415
Why this factor: the kilometer per hour and the foot per second are both defined against the meter per second, so dividing one definition by the other gives 0.911344415 directly. Both definitions are set out in full below.
To go the other way, divide by 0.911344415 — or use the Feet Per Second to Kilometers Per Hour converter, which is the same calculation reversed.
Worked example
Start with 60 km/h. Multiply by 0.911344415 to get 54.680665 ft/s.
60 km/h × 0.911344415 = 54.680665 ft/s
The converter above does this for any value you type, in either direction.
What is a kilometer per hour?
Kilometers per hour is the everyday speed unit for road traffic in most of the world.
Definition: Exactly 1,000 meters per 3,600 seconds, so 1 km/h is exactly 1/3.6 m/s.
Where it is used: Speed limits, vehicle speedometers, and weather wind speeds outside the US and UK.
Worth knowing: A handy shortcut: divide km/h by 3.6 for m/s, or multiply m/s by 3.6 to go the other way.
What is a foot per second?
Feet per second is a US engineering speed unit, common where distances are short.
Definition: Exactly 0.3048 meter per second, following from the exact definition of the foot.
Where it is used: Ballistics and muzzle velocities, fluid flow in pipes, and conveyor speeds in the US.
Kilometers Per Hour vs Feet Per Second
The kilometer per hour is a metric unit while the foot per second is an imperial unit. That is why the factor between them is not a round number: the two systems were defined independently and only later tied together by exact agreement.
Frequently asked questions
How many feet per second are in a kilometer per hour?
One kilometer per hour equals 0.911344415 feet per second.
What is the formula to convert kilometers per hour to feet per second?
Multiply the number of kilometers per hour by 0.911344415. To reverse it, divide by 0.911344415 instead.
How do I convert feet per second back to kilometers per hour?
Divide by 0.911344415, which is the same as multiplying by 1.09728.
How many feet per second are in 10 kilometers per hour?
10 km/h works out to 9.113444 ft/s.
Is there anything to watch out for with kilometers per hour?
A handy shortcut: divide km/h by 3.6 for m/s, or multiply m/s by 3.6 to go the other way.
How is the kilometer per hour defined?
Exactly 1,000 meters per 3,600 seconds, so 1 km/h is exactly 1/3.6 m/s.