HP to Watts Converter
Convert horsepower to watts instantly, and watts back to horsepower. Based on mechanical horsepower = 745.699872 W.
Independently verified for accuracy
Calculator by Toolsloft ↗- Result
- 745.699872 Watts (W)
- Conversion
- 1 Horsepower (hp) = 745.699872 Watts (W)
Convert horsepower to watts, and watts back to horsepower with the swap button. Useful for comparing motor and engine ratings quoted in different units. Enter the power and read the result at once.
How this is calculated
This uses mechanical horsepower, defined as 550 foot-pounds force per second, which works out to 745.6998715822702 watts. Horsepower is multiplied by that value to get watts, and the reverse divides. Metric horsepower (PS) differs slightly at 735.49875 W and is handled by the full power converter.
How to use
- Enter the power in horsepower.
- Keep the direction on hp to watts, or press Swap units for watts to hp.
- Read the result in watts.
Examples
- One horsepower:
1 hp = 745.699872 W - A 100 hp engine:
100 hp = 74569.987158 W - Watts to horsepower:
745.7 W = about 1 hp
FAQ
- How many watts is one horsepower?
- One mechanical horsepower is about 745.7 watts.
- Is this metric or mechanical horsepower?
- This tool uses mechanical horsepower (about 745.7 W). Metric horsepower, or PS, is about 735.5 W.