Watts to Horsepower Converter
Convert watts (W) to horsepower (mechanical, 550 ft·lbf/s) (hp), with the formula, a conversion table and exact factors.
Change the values and press Calculate to work out your own figures.
Enter a power, choose its unit and the unit you want. The answer is exact until it is shown, and the same value appears in every other unit.
Show the working
- 1 W = 0.0013410220896 hp
- 1 × 0.0013410220896 = 0.0013410220896 hp
How to convert watts to horsepower
1 W = 0.0013410220896 hp, so multiply by 0.0013410220896 to go from watts to horsepower (mechanical, 550 ft·lbf/s). Going the other way, 1 hp = 745.699871582 W.
hp = W × 0.0013410220896 W = hp × 745.699871582
Worked example:
1 W = 0.0013410220896 hp 5 × 0.0013410220896 = 0.00670511044798 hp
Watts to horsepower table
| Watts | Horsepower |
|---|---|
| 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 |
| 6 W | 0.00804613253757 hp |
| 7 W | 0.00938715462717 hp |
| 8 W | 0.0107281767168 hp |
| 9 W | 0.0120691988064 hp |
| 10 W | 0.013410220896 hp |
| 15 W | 0.0201153313439 hp |
| 20 W | 0.0268204417919 hp |
| 25 W | 0.0335255522399 hp |
| 30 W | 0.0402306626879 hp |
| 40 W | 0.0536408835838 hp |
| 50 W | 0.0670511044798 hp |
| 75 W | 0.10057665672 hp |
| 100 W | 0.13410220896 hp |
| 250 W | 0.335255522399 hp |
| 500 W | 0.670511044798 hp |
| 1000 W | 1.3410220896 hp |
About the units
- Watts (W)
- Watts, a metric unit. Definition: BIPM SI Brochure.
- Horsepower (hp)
- Horsepower (mechanical, 550 ft·lbf/s), a US customary unit. Exact from 550 × 0.3048 m × 0.45359237 kg × 9.80665 m/s² per second. Definition: NIST SP 811 Appendix B.9 (horsepower, 550 ft·lbf/s).