Watts to metric horsepower
Type a value in watts to see it in metric horsepower straight away, or type in the second box to convert back.
Loading the tool…
Processing and privacy: The result is calculated inside your browser and your data is not sent to any server.
How to use it
- Type the value in the watts box.
- Read the result in metric horsepower as you type, and pick the precision you need.
- Swap the direction to convert back, or copy the result.
How it is calculated
PS = W × 0.001359621617
Multiply the value in watts by 0.001359621617 to get metric horsepower.
Example
To convert 25 W to metric horsepower: 25 × 0.001359621617 = 0.0339905 PS.
Conversion table
| Watts (W) | Metric horsepower (PS) |
|---|---|
| 1 | 0.00135962 |
| 2 | 0.00271924 |
| 3 | 0.00407886 |
| 5 | 0.00679811 |
| 10 | 0.0135962 |
| 20 | 0.0271924 |
| 25 | 0.0339905 |
| 50 | 0.0679811 |
| 100 | 0.135962 |
| 250 | 0.339905 |
| 500 | 0.679811 |
| 1,000 | 1.35962 |
About the units
- Watt
- The SI unit of power, equal to one joule per second.
- Metric horsepower
- Metric horsepower (PS or CV) is 75 kilogram-force meters per second, exactly 735.49875 watts, used in European and Japanese car specifications.
Limits and caveats
- Results are rounded for display and computed with the browser's floating point precision (about 15 significant digits).
- Both unit factors are exact by their official definitions.
Questions about this tool
How many metric horsepower are in one watt?
1 W = 0.00135962 PS exactly.
How do I convert watts to metric horsepower?
Use PS = W × 0.001359621617. For example, 25 W = 0.0339905 PS.
How many watts are in one metric horsepower?
1 PS = 735.499 W.
What is the difference between mechanical and metric horsepower?
Mechanical horsepower is about 745.7 watts and is used in the US, while metric horsepower (PS) is 735.5 watts and is used in Europe and Japan. The same engine therefore shows a PS figure about 1.4% higher.
How many kilowatts is one ton of refrigeration?
One ton of refrigeration is 12000 BTU per hour, about 3.517 kW of cooling capacity. That is cooling output, not electricity use; the unit draws less power depending on its efficiency.