How to convert watts to horsepower
To convert watts to horsepower, multiply by 0.0013410220896. Power conversions compare engines, motors, appliances, solar panels and air conditioners.
Watt to Horsepower conversion table
| Watt (W) | Horsepower (hp) |
|---|---|
| 0.1 W | 0.00013410220896 hp |
| 0.5 W | 0.000670511044798 hp |
| 1 W | 0.0013410220896 hp |
| 2 W | 0.00268204417919 hp |
| 3 W | 0.00402306626879 hp |
| 4 W | 0.00536408835838 hp |
| 5 W | 0.00670511044798 hp |
| 10 W | 0.013410220896 hp |
| 20 W | 0.0268204417919 hp |
| 25 W | 0.0335255522399 hp |
| 50 W | 0.0670511044798 hp |
| 100 W | 0.13410220896 hp |
| 500 W | 0.670511044798 hp |
| 1,000 W | 1.3410220896 hp |
About the units
Watt (W)
The watt is the SI unit of power, one joule per second.
Horsepower (hp)
Mechanical horsepower is 550 foot-pounds per second, about 745.7 watts.
How to use this converter
- Type the number of watts (W) in the input box.
- The result in horsepower appears instantly — no button needed.
- See the same value in every other power unit just below.
- Use “Swap units” to convert horsepower back to watts.
Tips for better results
- Double-check which system a unit belongs to (for example US vs UK gallons).
- Use the swap button to convert in the opposite direction instantly.
- Bookmark the conversions you use most — each pair has its own page.
Frequently asked questions
How many horsepower are in one watt?
One watt equals 0.0013410220896 horsepower. 0.0013410220896 is the exact factor used by this converter.
How do I convert watts to horsepower?
Multiply the value in watts by 0.0013410220896. To go the other way, multiply horsepower by 745.699871582.
What is 10 W in hp?
10 W = 0.013410220896 hp. Also, 5 W = 0.00670511044798 hp and 100 W = 0.13410220896 hp.
What is the difference between a watt and a horsepower?
The watt is the SI unit of power, one joule per second. Mechanical horsepower is 550 foot-pounds per second, about 745.7 watts.
Is this tool free and private?
Yes — the Watt to Horsepower is completely free with no sign-up, and it runs entirely in your browser, so the values you enter are never uploaded to our servers.
Related tools
📬 Get new tools first — free
Join Taurang to hear about new calculators, converters and features. No spam; unsubscribe anytime.