Convert watts to horsepower quickly and accurately using this free online converter
Used for car and motorcycle engine ratings, motor specifications, and generator output.
💡 The US and UK commonly rate engines in horsepower (hp); most of the world uses kilowatts (kW) for official specifications.
hp = W × 0.00134102
Example: 1 W × 0.00134102 = 0.00134102 hp
Use kW for international and EU vehicle specifications; horsepower for US and UK marketing figures.
Common uses: vehicle engine specs, electric motors, and generators.
How do I convert W to hp?
Multiply the value in Watts by 0.00134102. For example: 10 W = 0.01341 hp.
When should I use Horsepower instead of Watts?
Use kW for international and EU vehicle specifications; horsepower for US and UK marketing figures.
Is this converter accurate?
Yes. We use internationally recognized conversion factors, updated to current standards.
| Watts (W) | Horsepower (hp) |
|---|---|
| 1 W | 0.00134102 hp |
| 5 W | 0.00670511 hp |
| 10 W | 0.01341 hp |
| 50 W | 0.067051 hp |
| 100 W | 0.134102 hp |
| 250 W | 0.335255 hp |
| 500 W | 0.670511 hp |
| 1000 W | 1.341 hp |