This horsepower to watts calculator converts HP to watts and watts back to HP. Enter a value above for an instant, accurate conversion.
Formula
Watts = HP × 745.7 HP = Watts ÷ 745.7
This uses mechanical (imperial) horsepower. Metric horsepower is 735.5 W.
Example
5 HP = 5 × 745.7 = 3,728.5 W.
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Frequently Asked Questions
How many watts in a horsepower?
One mechanical (imperial) horsepower equals 745.7 watts. Metric horsepower is slightly less at 735.5 watts.
How do I convert HP to watts?
Multiply horsepower by 745.7. For example, 5 HP equals 3,728.5 watts.
How do I convert watts to HP?
Divide watts by 745.7. So 1,000 watts is about 1.34 horsepower.