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

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:

  1. First, determine the density (lbs/ft^3). In this example, the density (lbs/ft^3) is given as 50.
  2. Next, determine the velocity (ft/s). For this problem, the velocity (ft/s) is given as 125.
  3. 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)