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Convert power.

Horsepower to kilowatts — with mechanical hp and metric PS kept apart, which is the 10 hp most car figures disagree by.

Power

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Every unit at once 13 units

Common power conversions

Each of these has its own page with the formula, a values table and both directions.

mechanical horsepower to kilowatts hp → kW kilowatts to watts kW → W metric horsepower to mechanical horsepower PS → hp BTU per hour to watts BTU/h → W megawatts to kilowatts MW → kW

Every power unit on this page

watt W
The SI unit of power, one joule per second. Every electrical device is rated in watts.
milliwatt mW
A thousandth of a watt, used for very small devices.
kilowatt kW
A thousand watts, the unit household electricity consumption is billed in.
megawatt MW
A million watts. Power stations and large industrial installations produce megawatts.
gigawatt GW
A billion watts, the scale of national power generation. The world's total capacity is around 10 terawatts.
mechanical horsepower hp
Exactly 745.7 watts. The unit American automobiles and industrial equipment are rated in. European cars are usually rated in metric horsepower (PS) instead, which is 735.5 watts.
metric horsepower PS
Exactly 735.5 watts, also called PS (Pferdestarke in German) or CV (Cavalli Vapore in Italian). The unit European automobiles have traditionally been rated in.
BTU per hour BTU/h
The rate at which British thermal units are produced or consumed. HVAC systems are rated in BTU per hour.
foot-pound per second ft·lbf/s
The power needed to lift one pound one foot per second.
calorie per second cal/s
The rate at which food calories — actually kilocalories — are burned as energy.
volt-ampere VA
The unit of apparent power in AC circuits, the product of volts and amperes.
kilovolt-ampere kVA
A thousand volt-amperes, used to rate transformers and large power supplies.
ton of refrigeration RT
The cooling power needed to freeze one ton of water into ice in 24 hours.
Other converters
Length Weight and mass Temperature Volume Area Speed Time Data storage Cooking volume Pressure Energy Force Angle Frequency Data transfer rate Fuel consumption

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