1 horsepower to watts
1 hp = 745.7 W. Change the amount below, or read the formula and the reference table further down.
1 horsepower equals
watts
1 hp = 745.7 W
The formula
Horsepower and watts both measure power from the same zero, so a single multiplier does the job.
W = hp × 745.7
Going the other way? Convert watts to horsepower.
Horsepower to watts table
Values either side of 1 hp.
| Horsepower (hp) | Watts (W) |
|---|---|
| -4 | -2,982.8 |
| -3.5 | -2,609.95 |
| -3 | -2,237.1 |
| -2.5 | -1,864.25 |
| -2 | -1,491.4 |
| -1.5 | -1,118.55 |
| -1 | -745.7 |
| -0.5 | -372.85 |
| 0 | 0 |
| 0.5 | 372.85 |
| 1 | 745.7 |
| 1.5 | 1,118.55 |
| 2 | 1,491.4 |
| 2.5 | 1,864.25 |
| 3 | 2,237.1 |
| 3.5 | 2,609.95 |
| 4 | 2,982.8 |
| 4.5 | 3,355.65 |
| 5 | 3,728.5 |
| 5.5 | 4,101.35 |
| 6 | 4,474.2 |
Questions people ask
- How many watts are in a horsepower?
- One horsepower equals 745.7 watts.
- How do I convert horsepower to watts by hand?
- Multiply the number of horsepower by 745.7. For a rough check, 745.7 is close enough for most everyday use.
- What is 1 horsepower in watts?
- 1 horsepower is 745.7 watts.
Calcuit generates this page from a unit table, so the factors here match every other page on the site.