Unit Converters
Power Converter
Power: power Converter converts between power units — watts, kilowatts and horsepower — through a watt base. Worked through below with real figures, and the calculator repeats the working on your own inputs — free, on-device, instant.
Enter your value plus the source and target units and Power Converter works out the converted power in the unit you choose with fixed, standard conversion ratios — fast, free and private, with no sign-up or uploads.
Horsepower means mechanical horsepower (550 ft·lbf/s). BTU uses the International Table convention; force-based factors use standard gravity, 9.80665 m/s².
About this calculator
Power Converter converts between power units — watts, kilowatts and horsepower — through a watt base. It matters whenever the same quantity is expressed in two systems and a wrong factor silently breaks the answer. Worked below as Convert 1 horsepower to watts: 1 × 745.7 = 745.7 W (1 mechanical hp = 745.7 W). — and the calculator on this page repeats exactly that working for your inputs, instantly, and offline after load.
How to use
- Enter the power value.
- Choose the From power unit.
- Choose the To power unit.
- Press Calculate to see the converted power.
Why use Power Converter
Fast
Calculations run in your browser. No round trip to a server.
Private
Your inputs never leave your device. Nothing is uploaded.
Free
No signup, no paywall, no ads-in-results, no watermarks.
Accurate
Uses standard conversion factors where applicable. Check critical engineering or measurement results before relying on them.
Mobile-ready
Optimised for phones, tablets, and desktops alike.
Transparent
Honest disclaimers wherever browser limits or regional rules apply.
Common uses
Use it when converting between unit systems
Use it for engineering and physics work
Use it for coursework and homework
Power in design and manufacturing
Use it for everyday unit reference
Use it when standardising units in a report
Technical notes
Power Converter converts between power units — watts, kilowatts and horsepower — through a watt base.
Conversions use standard reference factors; for trade or engineering tolerances keep more decimal places than the display shows.
Nothing you type is uploaded — the calculation happens entirely on your device.
FAQ
Which power units are supported?
Watts, kilowatts, megawatts, horsepower, BTU per hour, and foot-pounds per second.
How many horsepower is one kilowatt?
About 1.34102 hp.
Which horsepower definition is used?
Mechanical horsepower, defined as 745.7 watts.
Does the Power Converter send my data to a server?
No. The Power Converter runs entirely in your browser, so nothing you enter is uploaded, stored, or shared.
Worked example
Convert 1 horsepower to watts: 1 × 745.7 = 745.7 W (1 mechanical hp = 745.7 W).