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Power Converter

Convert power between watts, kilowatts, megawatts, horsepower and BTU per hour.

100% client-side · nothing is uploaded

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How to use the Power

  1. Enter the number you want to convert in the Value field.
  2. Pick the unit you're converting From and the unit you want To.
  3. Read the converted result, or use to swap the two units.
  4. 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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