Enter the pre-intercooler temperature (C), the post-intercooler temperature (C), and the ambient temperature (C) into the calculator to determine the Intercooler Efficiency. 

Intercooler Efficiency Formula

The following formula is used to calculate the Intercooler Efficiency.

Eint = (Tpre – Tpost) / ( Tpre – Tamb) *100

  • Where Eint is the Intercooler Efficiency (%)
  • Tpre is the pre-intercooler temperature (C) 
  • Tpost is the post-intercooler temperature (C) 
  • Tamb is the ambient temperature (C) 

How to Calculate Intercooler Efficiency?

The following example problems outline how to calculate the Intercooler Efficiency.

Example Problem #1

  1. First, determine the pre-intercooler temperature (C). In this example, the pre-intercooler temperature (C) is given as 25 .
  2. Next, determine the post-intercooler temperature (C). For this problem, the post-intercooler temperature (C) is given as  22.
  3. Next, determine the ambient temperature (C). In this case, the ambient temperature (C) is found to be 20.
  4. Finally, calculate the Intercooler Efficiency using the formula above: 

Eint = (Tpre – Tpost) / ( Tpre – Tamb) *100

Inserting the values from above and solving yields: 

Eint = (25- 22) / ( 25 – 20) *100 = 60 (%)


Example Problem #2

Using the same method as above, determine the variables required by the equation. For this example problem, these are provided as:

pre-intercooler temperature (C) = 30

post-intercooler temperature (C) = 27

ambient temperature (C) = 25

Enter these given values yields: 

Eint = (30-27) / ( 30 – 25) *100 = 60 (%)