Convert Watts to Horsepower (mechanical)
W to hp · power conversion
What are watts and horsepower (mechanical)?
The watt is the SI unit of power, one joule per second. Mechanical horsepower equals about 745.7 watts, the traditional measure of engine output. For reference: a typical car engine makes 100–150 kW (about 134–201 hp).
How to convert watts to horsepower (mechanical)
1 W = 0.00134102 hp. To convert, multiply the number of watts by 0.00134102. For example, 5 W = 0.00670511 hp, and 20 W = 0.0268204 hp. To go the other way, multiply horsepower (mechanical) by 745.7 (since 1 hp = 745.7 W).
Watts to Horsepower (mechanical) conversion table
| Watts (W) | Horsepower (mechanical) (hp) |
|---|---|
| 1 | 0.00134102 |
| 10 | 0.0134102 |
| 100 | 0.134102 |
| 500 | 0.670511 |
| 1,000 | 1.34102 |
| 2,000 | 2.68204 |
| 5,000 | 6.70511 |
FAQ
What is 1 W in hp?
1 W = 0.00134102 hp. To convert any amount, multiply the number of watts by 0.00134102.
How do I convert horsepower (mechanical) back to watts?
Go the other way: 1 hp = 745.7 W, so multiply horsepower (mechanical) by 745.7 to get watts.
Is a watt bigger than a horsepower (mechanical)?
No — 1 W is the smaller unit, equal to 0.00134102 hp (it takes 745.7 W to make one hp).
Are these power conversions exact?
They use the standard internationally-defined conversion factors. Results are rounded to six significant figures for readability, which is accurate enough for everyday and most technical use.