Power Converter
1 W = 0.001 kW
About the power category
How fast energy is used or delivered: engines, heaters, chargers, and solar.
You will reach for these conversions when comparing vacuum cleaners or engines (watts vs horsepower), or sizing EV chargers and solar installations (kW).
- A compact car: about 100 hp, or 75 kW
- A typical home EV charger: 11 kW
Popular power conversions
Common mistakes
- Metric hp (PS/CV, 735.5 W) vs mechanical hp (745.7 W): brochures mix them
- kW (power) vs kWh (energy on your bill): a 22 kW charger for 1 hour uses 22 kWh
Frequently asked questions
Which power units does this converter support?
6 units: Watt, Kilowatt, Megawatt, Horsepower (Mechanical), Horsepower (Metric), BTU per Hour. All conversions run locally in your browser, nothing is sent to a server.
How accurate are the power conversions?
All factors follow the official SI definitions and internationally agreed standards. Results are shown with up to 8 significant digits, which is far beyond the precision of everyday measurements.
Is this converter free?
Yes, completely free and unlimited, supported by ads. No app install, no sign-up.