Convert horsepower to watts and watts to horsepower instantly. Bidirectional power converter with formula and common values.
To convert mechanical horsepower to watts, multiply by 745.7. This factor is based on James Watt's original definition of 33,000 foot-pounds per minute.
| Horsepower | Watts |
|---|---|
| 0.5 | 372.85 |
| 3 | 2,237.1 |
| 15 | 11,185.5 |
| 75 | 55,927.5 |
| 150 | 111,855 |
| 300 | 223,710 |
| 500 | 372,850 |
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One mechanical horsepower equals approximately 745.7 watts. This is the most commonly used definition of horsepower.
James Watt coined the term in the late 18th century to compare steam engine output to the work a draft horse could do. He estimated one horse could do 33,000 foot-pounds of work per minute.
Yes. Mechanical (imperial) horsepower is 745.7 W, metric horsepower (PS) is 735.499 W, and electrical horsepower is exactly 746 W. This converter uses mechanical horsepower.
Multiply the horsepower rating by 745.7. For example, a 200 hp engine produces about 149,140 watts or roughly 149.1 kW.