When you need this conversion
Car and motorcycle specs (EU registrations list kW), outboard motors, generators, pumps and compressors, and electric motors.
Quick reference (mechanical hp)
- 1 hp = 0.7457 kW
- 100 hp = 74.57 kW
- 150 hp = 111.855 kW
- 200 hp = 149.14 kW
- 300 hp = 223.71 kW
- 500 hp = 372.85 kW
Which horsepower?
- Mechanical (hp, bhp): 745.7 W, used in the US and UK.
- Metric (PS, CV, pk): 735.5 W, used by German, French, Italian and Dutch manufacturers.
- Electrical: 746 W, used for motor nameplates.
A car rated 150 PS is 110.3 kW and 147.9 hp. Choose PS in the unit menu for European specs.
Common mistakes
Mixing PS and hp. They differ by about 1.4%, which is visible in spec sheets.
Confusing kW with kWh. Engine output is power (kW), not energy (kWh).
For the reverse, use kilowatts to horsepower.