Power & Heat Flow Converter
Horsepower to Watts Converter
Convert mechanical horsepower (hp) to electrical and physical Watts (W).
Power & Heat Flow
(hp)
Example: 250 hp
(W)
e.g. 186,424.968W
Standard: SI Base Power (1 W = 1 J/s)
Enter any number above to convert Horsepower to Watts. Click (i) for brief unit info.
Converting the other way?
Switch directly to the reverse calculator: Watts to Horsepower Converter
How to Convert Horsepower (Mechanical) to Watt
Official Mathematical Formula
Watts = hp × 745.69987
Where the input value in hp is transformed using the exact standardized conversion factor to produce the output in W.
Practical Calculation Example
You can verify this calculation directly using our interactive tool above.
Quick Conversion Reference Table (hp → W)
Horsepower (Mechanical) (hp) | Watt (W) | Copy |
|---|---|---|
| 1 hp | 745.6999 W | |
| 2 hp | 1,491.3997 W | |
| 3 hp | 2,237.0996 W | |
| 5 hp | 3,728.4994 W | |
| 10 hp | 7,456.9987 W | |
| 15 hp | 11,185.498 W | |
| 20 hp | 14,913.997 W | |
| 25 hp | 18,642.497 W | |
| 50 hp | 37,284.994 W | |
| 75 hp | 55,927.49 W | |
| 100 hp | 74,569.987 W | |
| 250 hp | 186,424.968 W | |
| 500 hp | 372,849.936 W | |
| 1000 hp | 745,699.872 W |
Horsepower (Mechanical) to Watt FAQs
In standard mechanical horsepower, 1 hp is approximately 745.7 Watts. Metric horsepower (PS) is 735.5 Watts.