Direct conversion
Convert watt [W] to horsepower (mechanical) [hp] instantly with formula, examples, chart, and FAQs.
Quick answer
Use the calculator below for any custom value, then check the formula, examples, chart, and reverse conversion links.
1 watt [W] = 0.001341 horsepower (mechanical) [hp]
1 watt [W] = 0.001341 horsepower (mechanical) [hp]
Example: 1 watt [W] equals 0.001341 horsepower (mechanical) [hp].
Power conversions use watt as the reference unit and include mechanical horsepower, electrical power, and heat-rate units.
Displayed results are rounded for readability. The calculator keeps enough precision for everyday use and switches to scientific notation for very large or very small values. Last reviewed: 2026-05-21.
The watt is the SI derived unit of power equal to one joule per second.
HistoryThe watt is named after James Watt and became the standard unit for power output and consumption.
Current useWatts are used for appliances, electronics, lighting, motors, solar panels, and power ratings.
Mechanical horsepower is a power unit equal to about 745.7 watts.
HistoryHorsepower was popularized to compare machine output with work previously done by draft animals.
Current useHorsepower is used for engines, motors, vehicles, pumps, and equipment output ratings.
| watt [W] | horsepower (mechanical) [hp] |
|---|---|
| 1 | 0.001341 |
| 2 | 0.002682 |
| 5 | 0.006705 |
| 10 | 0.01341 |
| 20 | 0.02682 |
| 25 | 0.033526 |
| 50 | 0.067051 |
| 100 | 0.134102 |
| 1000 | 1.341022 |
Use this formula: 1 watt [W] = 0.001341 horsepower (mechanical) [hp] Enter your value in the calculator and the result updates instantly.
1 watt [W] equals 0.001341 horsepower (mechanical) [hp].
Yes. Use the swap button in the calculator or open the related reverse conversion link when it is listed on this page.