Watts to Metric Horsepower
The watt is the SI unit of power, equal to one joule per second, used to rate everything from light bulbs to engines. Metric horsepower (PS or CV), about 735.5 watts, is the traditional engine power rating used across continental Europe and Japan. 1 W equals ≈0.00135962 hp(M), so converting between them is a matter of multiplying by that fixed factor — type any value into the converter below and both sides update instantly as you type.
Both units belong to power, measured here against power's base unit (W) — every other power unit on this site converts through that same reference point, which is why the table below can also be read as a quick cross-check against nearby values.
Formula
hp(M) = W × ≈0.00135962
W = hp(M) × ≈735.499
Worked example: 5 W × ≈0.00135962 = ≈0.00679811 hp(M).
Conversion table
| Watt (W) | Horsepower (metric) (hp(M)) |
|---|---|
| 1 W | ≈0.00135962 hp(M) |
| 2 W | ≈0.00271924 hp(M) |
| 3 W | ≈0.00407886 hp(M) |
| 5 W | ≈0.00679811 hp(M) |
| 10 W | ≈0.0135962 hp(M) |
| 20 W | ≈0.0271924 hp(M) |
| 25 W | ≈0.0339905 hp(M) |
| 50 W | ≈0.0679811 hp(M) |
| 100 W | ≈0.135962 hp(M) |
| 250 W | ≈0.339905 hp(M) |
| 500 W | ≈0.679811 hp(M) |
| 1,000 W | ≈1.35962 hp(M) |
Frequently asked
- How many Horsepower (metric) in a watt?
- 1 W equals ≈0.00135962 hp(M).
- How do I convert Watts to Horsepower (metric)?
- Multiply the value in W by ≈0.00135962 to get hp(M). The converter above does this instantly as you type.
- Is the conversion exact?
- Yes — Watt and Horsepower (metric) are both defined by a fixed conversion factor to power's base unit (W), so the result shown is exact to the precision displayed, not an approximation.