Enter the gas in the pipe, the compressor/condenser section, and the evaporator section into the calculator to determine the Refrigerant Charge. 

Refrigerant Charge Formula

The following formula is used to calculate the Refrigerant Charge.

Cr = GP + CC + E

  • Where Cr is the Refrigerant Charge
  • GP is the gas in the pipe 
  • CC is the compressor/condenser section 
  • E is the evaporator section 

How to Calculate Refrigerant Charge?

The following example problems outline how to calculate the Refrigerant Charge.

Example Problem #1

  1. First, determine the gas in the pipe. In this example, the gas in the pipe is given as 15 .
  2. Next, determine the compressor/condenser section. For this problem, the compressor/condenser section is given as  14 .
  3. Next, determine the evaporator section. In this case, the evaporator section is found to be 13.
  4. Finally, calculate the Refrigerant Charge using the formula above: 

Cr = GP + CC + E

Inserting the values from above yields: 

Cr = 15 + 14 + 13 = 42

Example Problem #2

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

gas in the pipe = 6

compressor/condenser section = 7

evaporator section = 8

Entering these given values and solving gives: 

Cr = 6 + 7 + 8 = 21