About the Horsepower to Watts Converter
Convert horsepower (mechanical) (hp) to watts (W) instantly. Includes the exact conversion factor, formula and a quick reference table.
Also known as: hp to W, Horsepower (mechanical) to Watts, convert Horsepower (mechanical) to Watts, hp to w, hp to w, horsepower to kw.
How to use this calculator
- Enter value in horsepower (mechanical).
- The result updates instantly as you type — press Calculate (or Enter) at any time.
- Open “Step-by-step” to see how the answer was worked out.
- Use Copy result or Share to save the answer or send a link with your inputs.
Formula
W = hp × 745.6998715823
Worked example
Using the values pre-filled in the calculator above:
- Value in horsepower (mechanical) = 100 hp
the calculator returns:
- Watts: 74,569.987158 W
- Milliwatts: 74,569,987.16 mW
- Kilowatts: 74.57 kW
- Megawatts: 0.07457 MW
Working
100 hp × 745.6998715823 = 74,569.98715823 W