Watts to Mechanical Horsepower Converter
1 watt ≈ 0.00134102209 mechanical horsepower
Metric horsepower (PS) is a different unit, about 1.4% smaller.
1 watt equals 0.00134102 mechanical horsepower
How to convert watts to mechanical horsepower
Power is energy transferred per time: 1 W = 1 J/s. Mechanical, metric and electrical horsepower have different definitions; select the version stated on the equipment rating.
hp = W ÷ 745.6998716One mechanical horsepower corresponds to 745.6998716 watts, so divide by that figure. Displayed constants may be rounded; the converter uses the stored factor before rounding the result.
0.0134102 hp ≈ 10 ÷ 745.6998716Metric horsepower (PS) is a different unit, about 1.4% smaller.
Watts to mechanical horsepower conversion table
Common values in watts, converted to mechanical horsepower.
| Watts (W) | Mechanical horsepower (hp) |
|---|---|
| 1 | 0.0013410221 |
| 2 | 0.0026820442 |
| 3 | 0.0040230663 |
| 4 | 0.0053640884 |
| 5 | 0.0067051104 |
| 10 | 0.013410221 |
| 20 | 0.026820442 |
| 25 | 0.033525552 |
| 50 | 0.067051104 |
| 100 | 0.13410221 |
| 250 | 0.33525552 |
| 500 | 0.67051104 |
| 1,000 | 1.3410221 |
About these units
wattW
The SI derived unit of power: one joule per second.
mechanical horsepowerhp
Exactly 550 foot-pounds per second: about 745.7 watts. The US and UK engine unit.
Sources and precision
Table results are rounded to 8 significant digits; formula constants may be rounded to 10. Worked example answers use 6 significant digits. The converter starts at 6 significant digits and lets you change display precision. Calculations use the stored factors without intermediate rounding. Exact unit definitions do not make an input measurement more precise; conventional and measured factors follow the assumptions stated here.