Watts to Horsepower (W to hp) Converter
1 watt (W) = 0.00134102 horsepower (hp). To convert watts to horsepower, multiply by 0.00134102: 25 W × 0.00134102 = 0.0335256 hp.
Quick facts
- 1 W = 0.00134102 hp
- 1 hp = 745.7 W
- Formula: hp = W × 0.00134102
- Quick estimate: multiply by about 0.0013
How to convert watts to horsepower
- Take the value in watts.
- Multiply it by 0.00134102 (the number of horsepower in one watt).
- Round the result to the precision you need.
Worked example: 25 W × 0.00134102 = 0.0335256 hp.
To convert horsepower back to watts, multiply by 745.7, or divide by 0.00134102.
Source: NIST SP 811 (2008), Appendix B (mechanical horsepower and international-table BTU).
Watts to Horsepower conversion table
| Watts [W] | Horsepower [hp] |
|---|---|
| 0.01 W | 0.0000134102 hp |
| 0.1 W | 0.0001341022 hp |
| 1 W | 0.0013410221 hp |
| 2 W | 0.0026820442 hp |
| 3 W | 0.0040230663 hp |
| 5 W | 0.0067051104 hp |
| 10 W | 0.0134102209 hp |
| 20 W | 0.0268204418 hp |
| 50 W | 0.0670511045 hp |
| 100 W | 0.134102209 hp |
| 1000 W | 1.3410220896 hp |
W to hp chart from 1 to 100
- 1 W 0.00134102 hp
- 2 W 0.00268204 hp
- 3 W 0.00402307 hp
- 4 W 0.00536409 hp
- 5 W 0.00670511 hp
- 6 W 0.00804613 hp
- 7 W 0.00938715 hp
- 8 W 0.0107282 hp
- 9 W 0.0120692 hp
- 10 W 0.0134102 hp
- 11 W 0.0147512 hp
- 12 W 0.0160923 hp
- 13 W 0.0174333 hp
- 14 W 0.0187743 hp
- 15 W 0.0201153 hp
- 16 W 0.0214564 hp
- 17 W 0.0227974 hp
- 18 W 0.0241384 hp
- 19 W 0.0254794 hp
- 20 W 0.0268204 hp
- 25 W 0.0335256 hp
- 30 W 0.0402307 hp
- 35 W 0.0469358 hp
- 40 W 0.0536409 hp
- 45 W 0.060346 hp
- 50 W 0.0670511 hp
- 55 W 0.0737562 hp
- 60 W 0.0804613 hp
- 65 W 0.0871664 hp
- 70 W 0.0938715 hp
- 75 W 0.100577 hp
- 80 W 0.107282 hp
- 85 W 0.113987 hp
- 90 W 0.120692 hp
- 95 W 0.127397 hp
- 100 W 0.134102 hp
Horsepower to Watts conversion table
| Horsepower [hp] | Watts [W] |
|---|---|
| 0.01 hp | 7.4569987158 W |
| 0.1 hp | 74.5699871582 W |
| 1 hp | 745.6998715823 W |
| 2 hp | 1491.3997431645 W |
| 3 hp | 2237.0996147468 W |
| 5 hp | 3728.4993579114 W |
| 10 hp | 7456.9987158227 W |
| 20 hp | 14913.9974316454 W |
| 50 hp | 37284.9935791135 W |
| 100 hp | 74569.987158227 W |
| 1000 hp | 745699.8715822703 W |
Watts vs Horsepower
| Watt | Horsepower | |
|---|---|---|
| Symbol | W | hp |
| Equals | 1 W = 0.00134102 hp | 1 hp = 745.7 W |
What is a watt?
The SI derived unit of power, equal to one joule per second. Used for electrical appliance and device power ratings.
What is a horsepower?
Originally defined to compare steam engines to draft horses. Used worldwide for engine and motor power ratings.
Frequently asked questions
How many horsepower are in a watt?
There are 0.00134102 horsepower in 1 watt (1 W = 0.0013410221 hp).
How many watts are in a horsepower?
There are 745.7 watts in 1 horsepower (1 hp = 745.6998715823 W).
How do I convert watts to horsepower?
Multiply the number of watts by 0.00134102. For example, 10 W × 0.00134102 = 0.0134102 hp. To convert back, multiply by 745.7.
What is 10 W in horsepower?
10 W = 0.0134102 hp.
What is 100 W in horsepower?
100 W = 0.134102 hp.
Is the conversion exact?
Yes. The factor comes from the official definitions of both units (NIST SP 811 (2008), Appendix B (mechanical horsepower and international-table BTU)). Results are shown to up to 10 decimal places; round them to suit your purpose.
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