Enter the density (lbs/ft^3) and the velocity (ft/s) into the calculator to determine the Surge Pressure.

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## Surge Pressure Formula

The following formula is used to calculate the Surge Pressure.

**Psurge = .8 * D * V**

- Where Psurge is the Surge Pressure (psi)
- D is the density (lbs/ft^3)
- V is the velocity (ft/s)

## How to Calculate Surge Pressure?

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

**Example Problem #1:**

- First, determine the density (lbs/ft^3). In this example, the density (lbs/ft^3) is given as 50.
- Next, determine the velocity (ft/s). For this problem, the velocity (ft/s) is given as 125.
- Finally, calculate the Surge Pressure using the equation above:

Psurge = .8 * D * V

Inserting the values from above and solving the equation:

Psurge = .8 * 50 *125 = 5000 (psi)

**Example Problem #2: **

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

density (lbs/ft^3) = 30

velocity (ft/s) = 85

Entering these values yields:

Psurge = .8 * 30 * 85 = 2040 (psi)