Power Converter
Free online power converter. Convert between milliwatts, watts, kilowatts, megawatts, gigawatts, horsepower, PS, BTU/hour, foot-pounds/second, and calories/second instantly with a live all-unit conversion table. 100% client-side and offline-ready.
Loading tool...
What is Power Converter?
A Power Converter is a free online unit converter that converts values between milliwatts (mW), watts (W), kilowatts (kW), megawatts (MW), gigawatts (GW), mechanical horsepower (hp), metric horsepower (PS), BTU per hour, foot-pounds per second, and calories per second. It computes the result locally in the browser, shows live output while you type, and also displays a full all-unit reference table so you can see the equivalent value in every power unit at once.
Key Benefits
- Convert between all common power units instantly
- See live results with high-precision formatting
- View an all-unit reference table from a single value
- Copy any result with one click
- Run fully offline with no data uploads
Common Use Cases
- •Compare electrical appliance and motor power ratings
- •Convert engine horsepower to kilowatts for automotive specs
- •Size HVAC equipment using BTU/hour and kW
- •Calculate power plant output in megawatts and gigawatts
- •Convert between mechanical and metric horsepower standards
How to Convert Power Units
- Enter a value: Type the numeric power value you want to convert in the Value field.
- Choose the source unit: Select the current unit of your value, such as kW, from the From unit dropdown.
- Choose the target unit: Select the unit you want the result in, such as hp, from the To unit dropdown.
- Read and copy the result: The converted value updates instantly, along with a full all-unit table. Click Copy to reuse it.
Key Features
- Convert ten common power units: milliwatts, watts, kilowatts, megawatts, gigawatts, mechanical horsepower, metric horsepower (PS), BTU/hour, foot-pounds/second, and calories/second.
- Live result updates as you type, with no submit button required.
- All-unit conversion table shows the equivalent value in every power unit at once.
- High-precision formatting that scales from tiny milliwatts to gigawatt power plants.
- One-click copy of any conversion result for quick reuse.
- Runs 100% client-side and works offline, so values never leave your device.