How to convert horsepower to watts
W = hp × 745.6998716Multiply the value in horsepower by 745.6998716. To go the other way, multiply by 0.00134102209 (or divide by 745.6998716).
A horsepower is larger than a watt: one horsepower contains 745.6998716 watts.
Worked examples
- 1 horsepower (mechanical)1 hp × 745.6998716 = 745.6998716 W
- 5 horsepower5 hp × 745.6998716 = 3,728.499358 W
- 10 horsepower10 hp × 745.6998716 = 7,456.998716 W
- 20 horsepower20 hp × 745.6998716 = 14,913.99743 W
- 100 horsepower100 hp × 745.6998716 = 74,569.98716 W
Horsepower to watts conversion table
Values are calculated by the conversion engine and rounded to 8 significant figures.
| Horsepower (hp) | Watts (W) |
|---|---|
| 0.1 hp | 74.569987 W |
| 0.25 hp | 186.42497 W |
| 0.5 hp | 372.84994 W |
| 1 hp | 745.69987 W |
| 2 hp | 1,491.3997 W |
| 3 hp | 2,237.0996 W |
| 4 hp | 2,982.7995 W |
| 5 hp | 3,728.4994 W |
| 6 hp | 4,474.1992 W |
| 7 hp | 5,219.8991 W |
| 8 hp | 5,965.599 W |
| 9 hp | 6,711.2988 W |
| 10 hp | 7,456.9987 W |
| Horsepower (hp) | Watts (W) |
|---|---|
| 12 hp | 8,948.3985 W |
| 15 hp | 11,185.498 W |
| 20 hp | 14,913.997 W |
| 25 hp | 18,642.497 W |
| 30 hp | 22,370.996 W |
| 40 hp | 29,827.995 W |
| 50 hp | 37,284.994 W |
| 75 hp | 55,927.49 W |
| 100 hp | 74,569.987 W |
| 250 hp | 186,424.97 W |
| 500 hp | 372,849.94 W |
| 1,000 hp | 745,699.87 W |
About the units
Horsepower (hp)
550 foot-pounds per second, about 745.7 W. US car and motor ratings use mechanical horsepower. One horsepower equals 745.6998716 watts (W).
Watt (W)
The SI unit of power: one joule per second. An LED bulb draws around 10 W, a microwave about 1,000 W.
Frequently asked questions
How many watts are in one horsepower?
There are 745.6998716 watts in one horsepower, and this value is exact by definition.
How do I convert horsepower to watts?
Multiply the number of horsepower by 745.6998716. For example, 10 hp × 745.6998716 = 7,456.998716 W.
How many horsepower are in one watt?
One watt equals 0.00134102209 horsepower. That is the reverse factor, 1 ÷ 745.6998716.
What is 10 horsepower in watts?
10 hp = 7,456.998716 W.
Is this hp to W converter accurate?
Yes. Both units are defined exactly in terms of SI units, so the conversion factor is exact; results are shown to 12 significant figures by default and you can change precision in the converter. Calculations run in your browser using the same tested engine that generated this page.