1 hp equals 745.7 W. To convert hp to W, multiply the value by 745.7; divide by 745.7 to convert back. Enter any number above and the result appears instantly — free and entirely in your browser.
How do you convert hp to W?
The conversion formula is W = hp × 745.7. The conversion factor is fixed by definition, so the result is always exact.
hp to W conversion table
| hp | W |
|---|---|
| 1 hp | 745.7 W |
| 5 hp | 3,728.5 W |
| 10 hp | 7,457 W |
| 50 hp | 37,285 W |
| 100 hp | 74,570 W |
| 150 hp | 111,855 W |
What is hp (hp)?
Mechanical horsepower (hp) equals about 745.7 watts. It is the imperial engine-power unit used in the US and UK — slightly larger than the metric PS.
What is W (W)?
The watt (W) is the SI unit of power: one joule per second. It measures the rate of energy use — a phone charger draws a few watts, an electric kettle around 2,000 W.
Why convert hp to W?
Car engines are rated in kilowatts by EU law, but everyday talk uses horsepower — PS in Europe, hp in the US and UK. Converting between kW, PS and hp is a constant need when comparing cars.
One metric horsepower (PS) is defined as exactly 735.49875 W, so 1 kW = 1.3596 PS. Mechanical horsepower (hp) is 745.7 W, giving 1 kW = 1.341 hp — the two horsepowers differ by about 1.4%.
How to convert hp to W
- Enter the value in hp into the left field of the converter.
- Read the result in W instantly in the right field — it updates automatically.
- Use the swap button to reverse the direction (W to hp).
The converter runs entirely in your browser: no uploads, no queue, no limits. You can even use it offline.