Enter the pump pressure (PSIG) and the flow rate (GPM) into the calculator to determine the Pump Power. 

Pump Power Formula

The following formula is used to calculate the Pump Power. 

Pp = P * Q / 1714

  • Where Pp is the Pump Power (horsepower)
  • P is the pump pressure (PSIG) 
  • Q is the flow rate (GPM) 

How to Calculate Pump Power?

The following two example problems outline how to calculate the Pump Power.

Example Problem #1:

  1. First, determine the pump pressure (PSIG). In this example, the pump pressure (PSIG) is measured to be 21.
  2. Next, determine the flow rate (GPM). For this problem, the flow rate (GPM) is calculated to be 500.
  3. Finally, calculate the Pump Power using the formula above: 

Pp = P * Q / 1714

Inserting the values from above and solving the equation with the imputed values gives: 

Pp = 21 * 500 / 1714 = 6.12 (horsepower)


Example Problem #2: 

Using the same process as example problem 1, we first define the variables outlined by the formula. In this case, the values are:

pump pressure (PSIG) = 100

flow rate (GPM) = 40

Entering these values into the formula or calculator above gives us:: 

Pp = 100 * 40 / 1714 = 2.33(horsepower)