In the automotive realm, a multitude of units govern technical specifics like power, torque, and distances. Regrettably, various nations employ distinct measurement systems, causing potential confusion. So, what sets apart HP, BHP, PS, and CV? This is where a unit converter comes into play, making cross-comparisons effortless. Rest assured, it’s not as complex as it may seem. Image: Gordon Murray Automotive, Cosworth ©

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Live converting tool

Introducing our interactive and user-centric tool designed for three essential parameters: power, torque, and speed.

Just input your preferred value into the relevant box, and our automated system will seamlessly handle the conversion process. It’s a swift, convenient solution that guarantees precise outcomes on every occasion.

Power conversion

Speed conversion

Torque conversion

What is the real difference between HP BHP PS and CV?

The origins of this disparity trace back to the industrial revolution. HP, BHP, and PS are distinct yet closely valued units.

CV (chevaux-vapeur or CH) and PS (Pferde Stärke) are based on DIN regulations. They are equivalent, representing the power needed to elevate a 75 kg (165.3 lbs) mass by 1 meter in 1 second, equalling 735.49875 Watts.

HP is similar but involves lifting a 76 kg (167.6 lbs) weight, yielding 745.3054 Watts.

Brake-horsepower (BHP) incorporates friction losses and HP. It’s measured by applying brake power to the crankshaft, while HP is assessed at the wheels. In essence, BHP represents engine output without drivetrain losses.

HP = BHP - power losses

Is CV and HP the same?

No, it is not the same unit. CV (and PS) is almost identical to HP, but there is a slight difference: 1 HP = 1.01368 CV (PS).

How do you convert HP to BHP?

Easily convert various units using our tool. Convert HP to kW, BHP, mph to kph, Nm to ft-lbs, and vice versa. For further information, refer to the comprehensive Wikipedia page or find a simple explanation at the bottom of this page. Need another unit conversion? Feel free to reach out.

For example, you can use this tool to translate the power output of vehicles like the Alfa Romeo Giulia we tested. Input its value in SI units (397 kW), and you’ll find it’s equivalent to 532.67 HP, 526.20 BHP, and 539.77 CV/PS. Another illustration: 800 hp is equal to 596.25 kW. Try it out for yourself!


WHP, or Wheel Horse Power, signifies the power output measured at the wheels during a dyno run, providing a crucial measure of the power actually transmitted to the road. Yet, converting standard horsepower (HP) to WHP is intricate, as the driveline generally incurs a 15% power loss due to friction from elements such as the gearbox, axle, and differential. To precisely ascertain WHP, a dyno bench test is necessary.

If you prefer to work with approximate values:

WHP = 0.85*HP