Convert power between watts, kilowatts, megawatts, horsepower and BTU per hour.
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How to use the Power
Enter the number you want to convert in the Value field.
Pick the unit you're converting From and the unit you want To.
Read the converted result, or use ⇅ to swap the two units.
Check the All units table to see your value expressed in every supported unit at once.
Privacy: this tool runs entirely in your browser. Your input is never sent to, received by, or stored on any server — there are no uploads and no tracking of what you enter.
About Power
Common power units
Watts and kilowatts (electrical and general), horsepower (engines), and BTU/hour (air conditioning).
Key conversions
1 hp is about 745.7 W. 1 kW is about 1.341 hp. 1 kW = 1000 W.
Where it helps
Comparing engine and motor outputs, sizing air conditioners, and electrical loads.
Frequently asked questions
How many watts in 1 horsepower?
About 745.7 watts (mechanical horsepower).
kW to hp?
Multiply kilowatts by about 1.341.
What is metric horsepower?
PS, about 735.5 W, slightly less than mechanical hp.
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