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

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## 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)

To calculate the differential pressure, subtract the applied pressure 2 from the 1st applied pressure.

## How to Calculate Differential Pressure?

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

**Example Problem #1:**

- First, determine the applied pressure 1 (psi). In this example, the applied pressure 1 (psi) is given as 500.
- Next, determine the applied pressure 2 (psi). For this problem, the applied pressure 2 (psi) is given as 200.
- 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)