Enter the total boost and the total pressure into the Calculator. The calculator will evaluate the Boost Pressure Ratio. 

Boost Pressure Ratio Formula

BPR = B / P


  • BPR is the Boost Pressure Ratio ()
  • B is the total boost
  • P is the total pressure

To calculate Boost Pressure Ratio, divide the total boost delivered by the total system pressure.

How to Calculate Boost Pressure Ratio?

The following steps outline how to calculate the Boost Pressure Ratio.

  1. First, determine the total boost. 
  2. Next, determine the total pressure. 
  3. Next, gather the formula from above = BPR = B / P.
  4. Finally, calculate the Boost Pressure Ratio.
  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.

total boost = 70

total pressure = 5000