Unit Converters
Power Converter
Power Converter is a browser-based calculator tool on CalcToolsBase. Free, browser-based Power Converter with instant, clearly-labelled results. No signup, no uploads. To use it, enter your values and view the result directly in your browser — no signup and nothing to install.
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.
About this calculator
Power Converter is built to convert a power measurement between units such as watts, kilowatts and horsepower without a server round-trip. Provide your value plus the source and target units and it uses fixed, standard conversion ratios to produce the converted power in the unit you choose, instantly and entirely in your browser, which makes it handy for quick checks and repeat runs.
For anyone switching between unit systems, it turns the calculation into a quick, repeatable check and presents the converted power in the unit you choose plainly. Everything is computed locally, so your figures stay on your machine.
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
Power when converting between unit systems
Power for engineering and physics work
Power for coursework and homework
Power in design and manufacturing
Power for everyday unit reference
Power 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).