Power Converter
Enter a power value in any unit to see it in every other unit at once.
How to use it
- Enter an amount Type the power to convert.
- Choose the starting unit Select it in the "From" menu.
- Read the conversions All other units update instantly.
Examples
| 1 horsepower | 745.7 W |
|---|---|
| 1 kilowatt | 1.34 hp |
About this tool
Power is the rate of energy use, measured in watts in the SI system and often in horsepower for engines and motors. This converter links watts and their multiples, mechanical and metric horsepower, and the BTU per hour used for heating and cooling.
The factors use standard definitions, so conversions are precise. Everything runs in your browser.
Frequently asked questions
How many watts are in one horsepower?
Mechanical horsepower is about 745.7 watts. Metric horsepower (PS) is slightly less, about 735.5 watts.
What is BTU per hour used for?
It rates the heating and cooling capacity of air conditioners and furnaces.
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Updated June 12, 2026