How do I convert between power units?

Enter your power value and select the source unit. The converter calculates equivalents in watts, kilowatts, horsepower, BTU/hr, and other units.

What is the difference between power and energy?

Power is the rate of energy transfer (watts = joules per second). Energy is total work done over time (kilowatt-hours = power × time).

When would I need to convert power units?

Power conversions are needed for comparing appliances, sizing motors and generators, calculating electrical loads, and HVAC system design.

Electric Motor Efficiency Power Converter - Free Online

Convert electric motor efficiency power values instantly with our free tool.

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Last updatedMay 21, 2026How we build & check our tools

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Frequently Asked Questions

Common questions about the Electric Motor Efficiency Power Converter - Free Online

1 mechanical horsepower ≈ 746 watts. Horsepower is traditional for engines and motors, while watts are the SI standard used in electrical power.

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Sources & References

International System of Units (SI): power and radiant flux

Power and radiant flux is measured in the watt (W); 1 hp = 745.6999 W. Conversions between SI and other units use exact, internationally agreed factors maintained by NIST.

→Source: NIST — International System of Units (SI)

International System of Units (SI)

Authoritative definitions for power and radiant flux, from the BIPM SI Brochure (9th edition), the defining reference for the SI.

→Source: BIPM — SI Brochure (9th ed.)

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