Convert Mechanical Horsepower to Metric Horsepower
Convert Mechanical Horsepower (hp) to Metric Horsepower (PS) instantly and accurately.
Conversion Formula
PS = hp × 1.013869665
About Mechanical Horsepower
The mechanical horsepower (hp) is exactly 550 ft·lbf/s ≈ 745.7 W - defined by James Watt by timing mine horses to set a comparable steam engine rating. A typical compact car produces 100-150 hp (75-112 kW); a sports car 300-600 hp; an F1 car ~1,000 hp (745 kW). SAE net horsepower is measured at the flywheel with all accessories fitted. Marine diesel engines, aircraft piston engines, and lawn equipment are still rated in hp. 1 hp = 550 ft·lbf/s = 745.6998715822704 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
| Mechanical Horsepower (hp) | Metric Horsepower (PS) |
|---|---|
| 1 hp | 1.01387 PS |
| 2 hp | 2.02774 PS |
| 5 hp | 5.06935 PS |
| 10 hp | 10.1387 PS |
| 25 hp | 25.3467 PS |
| 50 hp | 50.6935 PS |
| 100 hp | 101.387 PS |