Enter the Brake Horsepower and percentage of power loss into the calculator to determine the Crank to Wheel Horsepower. This calculator can also evaluate any of the variables given the others are known.

Crank To Wheel Hp Formula

The following formula is used to calculate the Crank to Wheel Horsepower (CWHp). 

CWHp = BHp * (1 - L)

Variables:

  • CWHp is the Crank to Wheel Horsepower (hp)
  • BHp is the Brake Horsepower, the total horsepower before power loss (hp)
  • L% is the percentage of power loss due to factors such as friction, heat, and other mechanical inefficiencies (decimal)

To calculate the Crank to Wheel Horsepower, multiply the Brake Horsepower by the difference of 1 and the percentage of power loss. This will give the horsepower that is effectively transferred from the engine to the wheels of the vehicle, taking into account the power loss due to various factors.

What is a Crank To Wheel Hp?

Crank To Wheel Hp refers to the measurement of horsepower from the crankshaft (the part of an engine which translates reciprocating linear piston motion into rotation) to the wheel of a vehicle. This measurement takes into account the loss of power that occurs due to various factors such as friction, heat, and other mechanical inefficiencies as power is transferred from the engine to the wheels. It is often less than the engine’s brake horsepower, which is the total horsepower before power loss.

How to Calculate Crank To Wheel Hp?

The following steps outline how to calculate the Crank to Wheel Horsepower (CWHp) using the given formula:

  1. First, determine the Brake Horsepower (BHp) value (hp).
  2. Next, determine the Percentage of power loss (L%) as a decimal.
  3. Next, use the formula CWHp = BHp * (1 – L%) to calculate the Crank to Wheel Horsepower.
  4. Finally, calculate the Crank to Wheel Horsepower (CWHp).
  5. After inserting the variables and calculating the result, check your answer with the calculator above.

Example Problem:

Use the following variables as an example problem to test your knowledge:

Brake Horsepower (BHp) = 300 hp

Percentage of power loss (L%) = 0.15