HP to Watts Converter
Useful for electric motors, pumps and power tools rated in horsepower. Uses mechanical horsepower.
1 hp = 745.6999 W
watts
1 hp = 745.6999 W
How to convert mechanical horsepower to watts
Multiply the number of mechanical horsepower by 745.69987.
Formula
W = hp × 745.69987
The factor is rounded; the converter uses the full-precision value.
Examples
- 0.5 hp × 745.69987 = 372.8499 W
- 1.5 hp × 745.69987 = 1,118.5498 W
- 5 hp × 745.69987 = 3,728.4994 W
Mechanical horsepower to watts conversion table
| Mechanical horsepower (hp) | Watts (W) |
|---|---|
| 0.125 | 93.2125 |
| 0.25 | 186.425 |
| 0.333 | 248.3181 |
| 0.5 | 372.8499 |
| 0.75 | 559.2749 |
| 1 | 745.6999 |
| 1.5 | 1,118.5498 |
| 2 | 1,491.3997 |
| 3 | 2,237.0996 |
| 5 | 3,728.4994 |
| 7.5 | 5,592.749 |
| 10 | 7,456.9987 |
| 15 | 11,185.4981 |
| 20 | 14,913.9974 |
| 50 | 37,284.9936 |
Values rounded to 4 decimal places or 4 significant digits.
About mechanical horsepower
Mechanical horsepower, also called imperial horsepower, is defined as 550 foot-pounds-force per second, about 745.7 watts. US and UK car engine ratings in "hp" or "bhp" use this definition.
About watts
The watt is the SI unit of power: one joule per second. Light bulbs, appliances and chargers are rated in watts.
Frequently asked questions
How many watts are in one mechanical horsepower?
One mechanical horsepower equals 745.6999 watts (rounded).
How do I convert mechanical horsepower to watts?
Multiply the number of mechanical horsepower by 745.69987. For example: 1.5 hp × 745.69987 = 1,118.5498 W.
How many mechanical horsepower are in one watt?
One watt equals 0.001341 mechanical horsepower.
Is the hp to W conversion exact?
The factor between these units has more decimals than are useful to show, so it is rounded on this page. The converter itself always calculates with the full-precision value.