Power Unit Converter (Watts, kW, HP)

Enter a power value and select the units to convert between watts, kilowatts and horsepower.

Power Unit Converter (Watts, kW, HP)

Convert power values between watts, kilowatts and horsepower.

This is a straightforward unit conversion using the standard mechanical horsepower definition (1 hp = 745.7 W); some regions use a slightly different metric horsepower definition (1 hp ≈ 735.5 W), which would give marginally different results.

Power ratings are given in different units depending on context — engines and motors are often rated in horsepower, while electrical appliances and electric motors are typically rated in watts or kilowatts.

Example

  • With the default values shown above, this calculator returns: Converted Value ≈ 74.5700.

Frequently Asked Questions

Is horsepower the same everywhere?

Not exactly — this calculator uses the common mechanical horsepower (745.7 W); metric horsepower (PS), used in some countries, is defined slightly differently at approximately 735.5 W.

Why do car engines use horsepower but electric motors use kW?

It is largely a matter of regional and industry convention — horsepower has historically been used for internal combustion engines, while kilowatts are the standard SI unit widely used for electric motors and appliances.

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