250 ft·lbf/s to PS — 250 foot-pounds per second in metric horsepower
Exact 250 ÷ 542.476039 = 0.46084985
250 foot-pounds per second in other units
| Watts | 338.954487 | W |
|---|---|---|
| Kilowatts | 0.33895449 | kW |
| Megawatts | 0.000338954487 | MW |
| Mechanical horsepower | 0.45454545 | hp |
| Metric horsepower | 0.46084985 | PS |
| BTU per hour | 1,156.56 | BTU/h |
ft·lbf/s to PS at a glance
| Foot-pounds per second | Metric horsepower |
|---|---|
| 1 ft·lbf/s | 0.001843399392 PS |
| 2 ft·lbf/s | 0.003686798783 PS |
| 3 ft·lbf/s | 0.005530198175 PS |
| 5 ft·lbf/s | 0.009216996958 PS |
| 10 ft·lbf/s | 0.01843399 PS |
| 20 ft·lbf/s | 0.03686799 PS |
| 25 ft·lbf/s | 0.04608498 PS |
| 50 ft·lbf/s | 0.09216997 PS |
| 100 ft·lbf/s | 0.18433994 PS |
| 250 ft·lbf/s | 0.46084985 PS |
| 500 ft·lbf/s | 0.9216997 PS |
| 1,000 ft·lbf/s | 1.843399 PS |
How to convert foot-pounds per second to metric horsepower
Multiply by 0.001843399392 — one foot-pound per second is 0.001843399392 metric horsepower. 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 250 ÷ 542.476039 = 0.46084985
What these units are
The foot-pound per second and the metric horsepower are covered in the power unit guide, along with every other unit on this page.
Questions
How many metric horsepower are in a foot-pound per second?
One foot-pound per second is 0.001843399392 metric horsepower. This figure is exact — it comes from the definition of the unit, not a measurement.
What is 250 foot-pounds per second in metric horsepower?
250 foot-pounds per second is 0.46084985 metric horsepower. The working is 250 ÷ 542.476039 = 0.46084985.
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.