Convert watts to horsepower
Enter a value in watts (W) to get horsepower (hp). One watt is 0.001341 horsepower; one horsepower (mechanical) is 745.6999 watts.
How to use the Watt to horsepower (mechanical)
- Type the number of watts.
- Click Convert.
- Read the result in horsepower, plus the same value in every other power unit.
W to hp formula
horsepower = watts × 0.001341. To go the other way, watts = horsepower × 745.6999 (see horsepower to watts).
Worked example
12 W × 0.001341 = 0.016092 hp.
Watts to horsepower conversion table
| Watts | Horsepower |
|---|---|
| 0.1 W | 0.0001341 hp |
| 0.5 W | 0.00067051 hp |
| 1 W | 0.001341 hp |
| 2 W | 0.002682 hp |
| 3 W | 0.004023 hp |
| 5 W | 0.006705 hp |
| 10 W | 0.01341 hp |
| 20 W | 0.02682 hp |
| 25 W | 0.033526 hp |
| 50 W | 0.067051 hp |
| 100 W | 0.134102 hp |
| 250 W | 0.335256 hp |
| 500 W | 0.670511 hp |
| 1,000 W | 1.341 hp |
About the watt
The SI unit: one joule per second. Appliances and light bulbs.
About the horsepower (mechanical)
Exactly 745.7 W. Car engines in the USA and UK.
Related conversions
Frequently asked questions
How many horsepower in a watt?
0.001341 horsepower.
How many watts in a horsepower (mechanical)?
745.6999 watts.
Is the factor exact?
The factor 0.001341 is derived from the units' exact definitions; only the display is rounded.
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Last updated 2026-09-23.