Enter the applied pressure 1 (psi) and the applied pressure 2 (psi) into the calculator to determine the Differential Pressure. 

Differential Pressure Formula

The following formula is used to calculate the Differential Pressure. 

dP = AP1 – AP2

  • Where dP is the Differential Pressure (psi)
  • AP1 is the applied pressure 1 (psi) 
  • AP2 is the applied pressure 2 (psi) 

How to Calculate Differential Pressure?

The following two example problems outline how to calculate the Differential Pressure.

Example Problem #1:

  1. First, determine the applied pressure 1 (psi). In this example, the applied pressure 1 (psi) is given as 500.
  2. Next, determine the applied pressure 2 (psi). For this problem, the applied pressure 2 (psi) is given as 200.
  3. Finally, calculate the Differential Pressure using the equation above: 

dP = AP1 – AP2

Inserting the values from above and solving the equation: 

dP = 500 – 200 = 300 (psi)


Example Problem #2: 

Using the same process as above, first define the variables required by the formula. In this case, these values are:

applied pressure 1 (psi) = 300

applied pressure 2 (psi) = 100

Entering these values yields:

dP = 300 – 100 = 200 (psi)