How to use Watts to Mechanical Horsepower
Type a value in watts and the mechanical horsepower figure appears straight away. The conversion table further down lists common values.
The formula
hp = W ÷ 745.699872
Examples
- 1 watts to mechanical horsepower
0.00134102 hp
- 10 watts to mechanical horsepower
0.01341022 hp
- 250 watts to mechanical horsepower
0.33525552 hp
Watts to Mechanical Horsepower conversion table
| Watts | Mechanical Horsepower |
|---|---|
| 1 | 0.0013 hp |
| 2 | 0.0027 hp |
| 3 | 0.004 hp |
| 4 | 0.0054 hp |
| 5 | 0.0067 hp |
| 6 | 0.008 hp |
| 7 | 0.0094 hp |
| 8 | 0.0107 hp |
| 9 | 0.0121 hp |
| 10 | 0.0134 hp |
| 15 | 0.0201 hp |
| 20 | 0.0268 hp |
| 25 | 0.0335 hp |
| 30 | 0.0402 hp |
| 40 | 0.0536 hp |
| 50 | 0.0671 hp |
| 75 | 0.1006 hp |
| 100 | 0.1341 hp |
| 250 | 0.3353 hp |
| 500 | 0.6705 hp |
| 1,000 | 1.341 hp |
Limitations and assumptions
Review inputs, units and assumptions before relying on the result. Detailed content, accessibility and edge-case review remains ongoing.
Frequently asked questions
How many mechanical horsepower are in one watt?
One watt equals 0.00134102 hp. The formula is hp = W ÷ 745.699872.
How do I convert watts to mechanical horsepower?
Use hp = W ÷ 745.699872. For example, 10 watts gives 0.01341022 hp. Enter your own value above and the converter does the arithmetic for you.
How do I convert mechanical horsepower back to watts?
Invert the relationship: reverse the formula so you divide where this one multiplies (and subtract where it adds).
Is this conversion exact?
Energy and power units mix SI and traditional definitions, so check whether a "calorie" means a small calorie or a food Calorie (kilocalorie).