Horsepower to Watts
Convert mechanical horsepower to watts with precision — multiply by 745.7. Essential for comparing engine power ratings with electrical motor and generator specs.
Result in W
745.7 W
About this calculator
Horsepower (hp) is a traditional power unit, while watts (W) are the SI standard. One mechanical horsepower equals exactly 745.7 watts. This conversion is useful when comparing engine power ratings with electrical motor specs. A 100 hp engine produces about 74,570 watts.
How to use the Horsepower to Watts converter
- Enter your value into the input field.
- Read the converted result.
- Adjust the input to try other values instantly.
- Copy the page URL to share the exact conversion.
Common examples
- 1 hp = 745.7 W
- 5 hp = 3,728.5 W
- 10 hp = 7,457 W
- 50 hp = 37,285 W
- 100 hp = 74,570 W
Frequently asked questions
How does the Horsepower to Watts converter work?
Enter a value in the source unit and the calculator applies the standard conversion factor (or temperature formula, where relevant) to give you the equivalent value in the target unit. The result updates as you type.
When would I use a Horsepower to Watts converter?
Whenever you need to translate a quantity between two units of measurement — common cases include travel, cooking, shipping, engineering, science homework, and reading product specifications written in a different system.
How accurate is the Horsepower to Watts converter?
Conversions use the standard definitions of each unit and full-precision arithmetic. The displayed value is rounded for readability, but the underlying calculation keeps higher precision so repeated conversions do not drift.
Can I share a specific conversion with someone else?
Yes. Every value you enter updates the URL, so copying the address bar and sharing the link reopens the exact same conversion for whoever clicks it.