Power units and how they relate
Mechanical (imperial) horsepower is 550 ft·lbf/s = 745.69987 W. Metric horsepower (PS) is exactly 735.49875 W.
| Unit | Symbol | Equals in watts |
|---|---|---|
| 1 watt | W | 1 W |
| 1 kilowatt | kW | 1,000 W |
| 1 megawatt | MW | 1,000,000 W |
| 1 horsepower | hp | 745.6998716 W |
| 1 metric horsepower | PS | 735.49875 W |
| 1 BTU per hour | BTU/h | 0.2930710702 W |