Power Converter

The Power Converter turns a single power figure into every common unit at once, so you never have to juggle conversion factors by hand.

Enter a value, pick the unit it is in, and the tool shows the equivalent in watts, kilowatts, megawatts, mechanical horsepower, metric horsepower (PS), BTU per hour, foot-pounds per second and calories per second.

Power is the rate of doing work, and different fields stubbornly use different units: electrical and appliance ratings are in watts and kilowatts, car and engine output is quoted in horsepower or PS, heating and air-conditioning capacity is given in BTU per hour, and physics problems often use foot-pounds per second.

This tool bridges them by converting everything through the SI base unit, the watt, which keeps the results consistent and accurate.

A subtle but important detail is that "horsepower" is not one number — mechanical (imperial) horsepower is about 745.7 W while metric horsepower is about 735.5 W.

The converter handles both separately so you get the right figure for the spec sheet you are reading.

All calculations happen locally in your browser; nothing is uploaded or logged, and the tool works offline once the page has loaded.

Copy the full set of conversions with one click for use in a report, quote or spreadsheet.