Power tools
Power Converter
Convert power units for engines, appliances, electrical loads, HVAC, and mechanical work.
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Instant results1 watt [W] = 0.001 kilowatt [kW]
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| Unit | Symbol | Conversion factor | Quick links |
|---|---|---|---|
| watt | W | Base unit | Reference unit |
| kilowatt | kW | 1 kilowatt [kW] = 1000 W | to W from W |
| megawatt | MW | 1 megawatt [MW] = 1000000 W | to W from W |
| horsepower (mechanical) | hp | 1 horsepower (mechanical) [hp] = 745.699872 W | to W from W |
| horsepower (metric) | PS | 1 horsepower (metric) [PS] = 735.49875 W | to W from W |
| BTU per hour | BTU/h | 1 BTU per hour [BTU/h] = 0.293071 W | to W from W |
| foot-pound per second | ft-lb/s | 1 foot-pound per second [ft-lb/s] = 1.355818 W | to W from W |
| calorie per second | cal/s | 1 calorie per second [cal/s] = 4.184 W | to W from W |
Accuracy and Sources
Power factors use watt as the reference unit, including electrical power, horsepower, BTU per hour, and mechanical work rates. Content was last reviewed on 2026-05-21. For safety-critical work, confirm results against the relevant official standard.
How power conversion works
Power conversion changes a measurement from one unit to another using a fixed factor or formula. Use the calculator above for instant results, then check the table and related converter links for common values.
Frequently Asked Questions
View sitemap →What is the base unit for power?
The reference base unit used on this page is W.
Are these power conversions accurate?
Yes, the calculator uses the conversion factors listed on the page. For critical work, verify results with an authoritative standard.