Convert Watts to Metric Horsepower
1 watt (W) equals 0.001359621617 metric horsepower (PS).
1 W = 0.001359621617 PS
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk watt to metric horsepower converter to paste a column from Excel.
How to Convert Watt to Metric Horsepower
- 1 W = 0.001359621617 PS
- 1 PS = 735.49875 W
- Example: convert 15 W to PS: 15 W = 15 × 0.001359621617 PS = 0.02039432426 PS
Formula
PS = W × 0.001359621617304
or PS = W ÷ 735.49875
Derivation from SI units:
- 1 W = 1 J/s = 1 kg·m²·s⁻³
- 1 PS = 75 kgf·m/s = 735.49875 W (exact)
Both units are defined exactly, so the factor is exact. Watt definition: watt; Metric Horsepower definition: metric horsepower.
Worked examples
- A reading of 100 W converts to 0.1359621617 PS.
100 W × 0.001359621617 = 0.1359621617 PS - A value of 1500 W is 2.039432426 PS.
1500 W × 0.001359621617 = 2.039432426 PS
Watt to Metric Horsepower conversion table
| Watts (W) | Metric Horsepower (PS) |
|---|---|
| 1 W | 0.001359621617 PS |
| 5 W | 0.006798108087 PS |
| 10 W | 0.01359621617 PS |
| 40 W | 0.05438486469 PS |
| 60 W | 0.08157729704 PS |
| 100 W | 0.1359621617 PS |
| 250 W | 0.3399054043 PS |
| 500 W | 0.6798108087 PS |
| 746 W | 1.014277727 PS |
| 1000 W | 1.359621617 PS |
| 1500 W | 2.039432426 PS |
| 2000 W | 2.719243235 PS |
| 3500 W | 4.758675661 PS |
| 5000 W | 6.798108087 PS |
| 10000 W | 13.59621617 PS |
Where it's used
Watts are used for electrical appliance ratings, while metric horsepower appear in european and Japanese car specifications (PS, CV). Both measure power (energy per unit time), so the conversion is a fixed factor.
Watt to other power units
| Conversion | 1 W equals |
|---|---|
| watt to milliwatt | 1000 mW |
| watt to kilowatt | 0.001 kW |
| watt to megawatt | 0.000001 MW |
| watt to horsepower | 0.00134102209 hp |
| watt to metric horsepower | 0.001359621617 PS |
| watt to BTU per hour | 3.412141633 BTU/h |
| watt to refrigeration ton | 0.0002843451361 TR |
| watt to kilocalorie per hour | 0.8598452279 kcal/h |
| watt to foot-pound per second | 0.7375621493 ft·lbf/s |
Frequently asked questions
How many metric horsepower are in 1 watt?
1 W = 0.001359621617 PS.
How do I convert watts to metric horsepower?
Multiply the value in W by 0.001359621617, or divide it by 735.49875. For example, 15 W × 0.001359621617 = 0.02039432426 PS.
Is the W to PS conversion exact?
Yes. Both units are defined exactly, so the ratio is exact; its decimal form does not terminate and is shown here to 10 significant figures (more with the precision selector).
Sources
- The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures , Table 4, coherent derived units with special names.
- Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "horsepower (metric)".
Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.
Cite this page
APA
Scientific Converters. (2026, October 15). Convert Watts to Metric Horsepower. Retrieved October 17, 2026, from https://scientificconverters.com/power/watts-to-metric-horsepower/
IEEE
Scientific Converters, "Convert Watts to Metric Horsepower," scientificconverters.com. Accessed: Oct. 17, 2026. [Online]. Available: https://scientificconverters.com/power/watts-to-metric-horsepower/