Metric Horsepower to Horsepower
Metric horsepower (PS or CV), about 735.5 watts, is the traditional engine power rating used across continental Europe and Japan. Mechanical horsepower, about 745.7 watts, is the traditional unit for rating car and engine power in the US and UK. 1 hp(M) equals ≈0.98632 hp, 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 = hp(M) × ≈0.98632
hp(M) = hp × ≈1.01387
Worked example: 5 hp(M) × ≈0.98632 = ≈4.9316 hp.
Conversion table
| Horsepower (metric) (hp(M)) | Horsepower (mech.) (hp) |
|---|---|
| 1 hp(M) | ≈0.98632 hp |
| 2 hp(M) | ≈1.97264 hp |
| 3 hp(M) | ≈2.95896 hp |
| 5 hp(M) | ≈4.9316 hp |
| 10 hp(M) | ≈9.8632 hp |
| 20 hp(M) | ≈19.7264 hp |
| 25 hp(M) | ≈24.658 hp |
| 50 hp(M) | ≈49.316 hp |
| 100 hp(M) | ≈98.632 hp |
| 250 hp(M) | ≈246.58 hp |
| 500 hp(M) | ≈493.16 hp |
| 1,000 hp(M) | ≈986.32 hp |
Frequently asked
- How many Horsepower in a horsepower (metric)?
- 1 hp(M) equals ≈0.98632 hp.
- How do I convert Horsepower (metric) to Horsepower?
- Multiply the value in hp(M) by ≈0.98632 to get hp. The converter above does this instantly as you type.
- Is the conversion exact?
- Yes — Horsepower (metric) and Horsepower (mech.) 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.