ft·lbf/s to kW — convert foot-pounds per second to kilowatts
Exact 1 ÷ 737.562149 = 0.001355817948
1 foot-pound per second in other units
| Watts | 1.355818 | W |
|---|---|---|
| Kilowatts | 0.001355817948 | kW |
| Megawatts | 0.000001355818 | MW |
| Mechanical horsepower | 0.001818181818 | hp |
| Metric horsepower | 0.001843399392 | PS |
| BTU per hour | 4.626243 | BTU/h |
ft·lbf/s to kW at a glance
| Foot-pounds per second | Kilowatts |
|---|---|
| 1 ft·lbf/s | 0.001355817948 kW |
| 2 ft·lbf/s | 0.002711635897 kW |
| 3 ft·lbf/s | 0.004067453845 kW |
| 5 ft·lbf/s | 0.006779089742 kW |
| 10 ft·lbf/s | 0.01355818 kW |
| 20 ft·lbf/s | 0.02711636 kW |
| 25 ft·lbf/s | 0.03389545 kW |
| 50 ft·lbf/s | 0.0677909 kW |
| 100 ft·lbf/s | 0.13558179 kW |
| 250 ft·lbf/s | 0.33895449 kW |
| 500 ft·lbf/s | 0.67790897 kW |
| 1,000 ft·lbf/s | 1.355818 kW |
How to convert foot-pounds per second to kilowatts
Multiply by 0.001355817948 — one foot-pound per second is 0.001355817948 kilowatts. That factor is exact: it comes from the definition of the units rather than from a measurement, so it will not change and does not need rounding.
Working 1 ÷ 737.562149 = 0.001355817948
What these units are
The foot-pound per second and the kilowatt are covered in the power unit guide, along with every other unit on this page.
Questions
How many kilowatts are in a foot-pound per second?
One foot-pound per second is 0.001355817948 kilowatts. This figure is exact — it comes from the definition of the unit, not a measurement.
What is 1 foot-pound per second in kilowatts?
1 foot-pound per second is 0.001355817948 kilowatts. The working is 1 ÷ 737.562149 = 0.001355817948.
Why does the same car have two different horsepower figures?
Because there are two horsepowers. Metric horsepower, written PS or CV, is 735.49875 W; mechanical horsepower, written hp or bhp, is about 745.7 W. A car sold as 150 PS in Germany is 148 hp in Britain, and nothing about the engine has changed.
Where does 746 watts come from?
From James Watt, who needed to sell steam engines to people who owned horses. He measured a mill horse turning a wheel and settled on 550 foot-pounds per second — a figure most real horses cannot sustain, which made the comparison flattering to his engines.
How do I read an air conditioner's BTU rating?
BTU ratings are BTU per hour, a rate of heat movement, even when the "per hour" is dropped. A 12,000 BTU/h unit shifts about 3.5 kW of heat. That is not what it draws from the wall — a decent unit moves several times more heat than the electricity it consumes.
What is the difference between power and energy?
Power is a rate, energy is an amount. A kilowatt is how fast something uses energy; a kilowatt-hour is how much it used. A 2 kW heater running for three hours has a power of 2 kW throughout and has consumed 6 kWh. Bills are in energy; ratings are in power.