Watt to Horsepower (mechanical) Converter
1 watt is about 0.00134102209 horsepower. Convert watts (W) to horsepower (hp) below: type a value and the result updates as you type.
W to hp calculator
Result
Watt to Horsepower (mechanical) conversion
1 W ≈ 0.00134102209 hpone watt in horsepower
1 hp = 745.69987158227022 Wone horsepower in watts
Watt (W): SI derived unit: one joule per second.
Horsepower (mechanical) (hp): Exactly 550 foot-pounds-force per second (about 745.69987 watts).
Source:Watt: SI Brochure, 9th edition (BIPM, 2019); Horsepower (mechanical): NIST Special Publication 811 (2008), Appendix B.8
How to convert watts to horsepower
To convert watts to horsepower, multiply the number of watts by about 0.00134102209.
Formula
hp = W × 0.00134102209
The factor is rounded here. The calculator uses the exact value.
Examples
- 5 W = 5 × 0.00134102209 ≈ 0.006705110448 hp
- 25 W = 25 × 0.00134102209 ≈ 0.03352555224 hp
- 100 W = 100 × 0.00134102209 ≈ 0.134102209 hp
Watt to Horsepower (mechanical) conversion table
| Watt (W) | Horsepower (mechanical) (hp) |
|---|---|
| 0.1 W | 0.000134102209 hp |
| 0.5 W | 0.0006705110448 hp |
| 1 W | 0.00134102209 hp |
| 2 W | 0.002682044179 hp |
| 3 W | 0.004023066269 hp |
| 5 W | 0.006705110448 hp |
| 10 W | 0.0134102209 hp |
| 20 W | 0.02682044179 hp |
| 25 W | 0.03352555224 hp |
| 50 W | 0.06705110448 hp |
| 100 W | 0.134102209 hp |
| 250 W | 0.3352555224 hp |
| 500 W | 0.6705110448 hp |
| 1000 W | 1.34102209 hp |
Values rounded to 10 significant digits where needed.
Frequently asked questions
- How many horsepower are in one watt?
- One watt is about 0.00134102209 horsepower.
- How do I convert horsepower to watts?
- To convert horsepower to watts, multiply the number of horsepower by 745.69987158227022. The formula is W = hp × 745.69987158227022.
- Is this conversion exact?
- Yes. Both units have exact definitions, but the factor has more decimal places than can be shown, so displayed results are rounded. The calculator works with 50 significant digits before rounding.
- Which is larger, a watt or a horsepower?
- A horsepower is 745.69987158227022 times larger than a watt. In other words, a watt is about 0.00134102209 of a horsepower.