How to use Horsepower to Watts
Type a value in horsepower and the watts figure appears straight away. The conversion table further down lists common values.
The formula
W = hp × 745.699872
Examples
- 1 horsepower to watts
745.699872 W
- 10 horsepower to watts
7,456.99872 W
- 250 horsepower to watts
186,424.968 W
Horsepower to Watts conversion table
| Horsepower | Watts |
|---|---|
| 1 | 745.6999 W |
| 2 | 1,491.3997 W |
| 3 | 2,237.0996 W |
| 4 | 2,982.7995 W |
| 5 | 3,728.4994 W |
| 6 | 4,474.1992 W |
| 7 | 5,219.8991 W |
| 8 | 5,965.599 W |
| 9 | 6,711.2988 W |
| 10 | 7,456.9987 W |
| 15 | 11,185.4981 W |
| 20 | 14,913.9974 W |
| 25 | 18,642.4968 W |
| 30 | 22,370.9962 W |
| 40 | 29,827.9949 W |
| 50 | 37,284.9936 W |
| 75 | 55,927.4904 W |
| 100 | 74,569.9872 W |
| 250 | 186,424.968 W |
| 500 | 372,849.936 W |
| 1,000 | 745,699.872 W |
Limitations and assumptions
Review inputs, units and assumptions before relying on the result. Detailed content, accessibility and edge-case review remains ongoing.
Frequently asked questions
How many watts are in one horsepower?
One horsepower equals 745.699872 W. The formula is W = hp × 745.699872.
How do I convert horsepower to watts?
Use W = hp × 745.699872. For example, 10 horsepower gives 7,456.99872 W. Enter your own value above and the converter does the arithmetic for you.
How do I convert watts back to horsepower?
Invert the relationship: reverse the formula so you divide where this one multiplies (and subtract where it adds).
Is this conversion exact?
Energy and power units mix SI and traditional definitions, so check whether a "calorie" means a small calorie or a food Calorie (kilocalorie).