Convert Electrical Horsepower to Metric Horsepower
Convert Electrical Horsepower (hp(E)) to Metric Horsepower (PS) instantly and accurately.
Conversion Formula
PS = hp(E) × 1.014277727
About Electrical Horsepower
The electrical horsepower (hp(E)) is defined as exactly 746 W - the US NEMA rounding used on electric motor nameplates. It differs from mechanical hp (745.7 W) by only 0.04%. Every NEMA-rated motor in the US carries a horsepower nameplate: a '5 hp motor' delivers 5 × 746 = 3,730 W. NEC motor branch-circuit sizing tables, overload relay selection, and starter ratings are all based on hp(E). Despite global kW adoption, US industrial motor infrastructure remains standardised in electrical horsepower. 1 hp(E) = 746 W.
About Metric Horsepower
The metric horsepower (PS/CV/pk) equals exactly 75 kgf·m/s = 735.49875 W - the European equivalent of mechanical horsepower, defined as lifting 75 kg by 1 m/s. It was the DIN 66036 standard for European automotive ratings until the EU mandated kW. A 100 PS car produces 73.55 kW; 200 PS = 147.1 kW. The ~1.4% difference from mechanical hp (745.7 W) means a 100 PS car rates as 98.6 mechanical hp. German car advertising still shows PS parenthetically alongside kW. 1 PS = 735.49875 W.
Quick Reference Table
| Electrical Horsepower (hp(E)) | Metric Horsepower (PS) |
|---|---|
| 1 hp(E) | 1.01428 PS |
| 2 hp(E) | 2.02856 PS |
| 5 hp(E) | 5.07139 PS |
| 10 hp(E) | 10.1428 PS |
| 25 hp(E) | 25.3569 PS |
| 50 hp(E) | 50.7139 PS |
| 100 hp(E) | 101.428 PS |