Power Converter Calculator

Power Converter Calculator

Convert power values quickly between watts, kilowatts, megawatts, horsepower, BTU per hour, foot-pounds per second and other commonly used power units.

Power Conversion

Converted Power
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Power Unit Reference

Unit Symbol Equivalent in Watts
Watt W 1 W
Kilowatt kW 1,000 W
Megawatt MW 1,000,000 W
Gigawatt GW 1,000,000,000 W
Terawatt TW 1,000,000,000,000 W
Horsepower hp 745.699872 W
Metric Horsepower PS 735.49875 W
Brake Horsepower bhp 745.699872 W
BTU per Hour BTU/h 0.29307107 W
Foot-pound per Second ft·lbf/s 1.355817948 W
Foot-pound per Minute ft·lbf/min 0.0225969658 W
Kilocalorie per Hour kcal/h 1.162222222 W
Calorie per Second cal/s 4.184 W
Erg per Second erg/s 0.0000001 W

Power Conversion Formula

The calculator first converts the entered value into Watts (W), the SI unit of power, and then converts the Watt value into the selected target unit.

General Formula:

Power in Watts = Input Value × Source Unit Factor

Converted Power = Power in Watts ÷ Target Unit Factor

Example: 1 kilowatt = 1,000 watts and 1 mechanical horsepower ≈ 745.699872 watts.

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