15 kW to hp — 15 kilowatts in mechanical horsepower
Exact 15 × 1.341022 = 20.115331
15 kilowatts in other units
| Watts | 15,000 | W |
|---|---|---|
| Megawatts | 0.015 | MW |
| Mechanical horsepower | 20.115331 | hp |
| Metric horsepower | 20.394324 | PS |
| BTU per hour | 51,182.12 | BTU/h |
| Foot-pounds per second | 11,063.43 | ft·lbf/s |
kW to hp at a glance
| Kilowatts | Mechanical horsepower |
|---|---|
| 1 kW | 1.341022 hp |
| 2 kW | 2.682044 hp |
| 3 kW | 4.023066 hp |
| 5 kW | 6.70511 hp |
| 10 kW | 13.410221 hp |
| 20 kW | 26.820442 hp |
| 25 kW | 33.525552 hp |
| 50 kW | 67.051104 hp |
| 100 kW | 134.102209 hp |
| 250 kW | 335.255522 hp |
| 500 kW | 670.511045 hp |
| 1,000 kW | 1,341.02 hp |
How to convert kilowatts to mechanical horsepower
Multiply by 1.341022 — one kilowatt is 1.341022 mechanical 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 15 × 1.341022 = 20.115331
In words: about twenty mechanical horsepower.
Questions
How many mechanical horsepower are in a kilowatt?
One kilowatt is 1.341022 mechanical horsepower. This figure is exact — it comes from the definition of the unit, not a measurement.
What is 15 kilowatts in mechanical horsepower?
15 kilowatts is 20.115331 mechanical horsepower. The working is 15 × 1.341022 = 20.115331.
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.