Watts to Joules
Power converter

Horsepower to Watts Calculator

Calculate the electrical wattage required to produce a specific horsepower.

HP

How HP to Watts works

To figure out how much electrical power an electric motor draws, you need to convert its mechanical horsepower rating to watts.

By multiplying the horsepower by 745.7, you can find the electrical equivalent. Note that real-world electric motors are not 100% efficient, so they will draw more watts from the wall than they output in mechanical power.

Formula
1Watts = HP × 745.7

1 Mechanical HP = 745.699872 W.

HP to Watts conversion table

Reference Table4 rows
Common horsepower ratings to watts.
Horsepower↕Watts↕Kilowatts (kW)↕
1/2 HP
373 W
0.37 kW
1 HP
746 W
0.75 kW
2 HP
1,491 W
1.49 kW
5 HP
3,728 W
3.73 kW
💡 Click any row to auto-fill the calculator aboveClick column headers to sort

FAQ: HP to Watts

How do you convert horsepower to watts?

Multiply the horsepower rating by 745.7.

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