Horsepower to Watts Converter
Convert horsepower (hp) to watts (W) instantly. Type a value — the result updates as you type, and the swap button converts the other way.
hp to Watts formula
W = hp × 745.69987158227
1 horsepower = 745.7 watts · 1 watt = 0.001341 horsepower
To convert horsepower to watts, multiply the value by 745.69987158227. For example, 1 hp:
W = 1 × 745.69987158227W = 745.699872
So 1 hp = 745.7 W.
Mental math shortcut
This conversion is exact, so there is no need to estimate: just multiply by 745.699872.
hp to Watts conversion table
Watts back to hp
The same values converted the other way, rounded for everyday use:
| Watts | Horsepower |
|---|---|
| 186.42 W | 0.25 hp |
| 372.85 W | 0.5 hp |
| 745.7 W | 1 hp |
| 1491.4 W | 2 hp |
| 3728.5 W | 5 hp |
| 7457 W | 10 hp |
| 74569.99 W | 100 hp |
About the units
Horsepower (hp)
Mechanical horsepower is about 745.7 watts. It is the traditional unit of engine power in the US.
Watts (W)
Frequently asked questions
How many watts are in a horsepower?
One horsepower equals 745.7 watts.
What is 1 hp in Watts?
1 hp = 745.7 W.
How do I convert Watts back to hp?
Divide the watts by 745.69987158227. Or use the Watts to Horsepower converter.