Convert horsepower to watts 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.
W = hp × 745.7
Example: 1 hp × 745.7 = 745.7 W
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 hp to W?
Multiply the value in Horsepower by 745.7. For example: 10 hp = 7457 W.
When should I use Watts instead of Horsepower?
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.
| Horsepower (hp) | Watts (W) |
|---|---|
| 1 hp | 745.7 W |
| 5 hp | 3728.5 W |
| 10 hp | 7457 W |
| 50 hp | 37,285.00 W |
| 100 hp | 74,570.00 W |
| 250 hp | 186,425.00 W |
| 500 hp | 372,850.00 W |
| 1000 hp | 745,700.00 W |