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

Pump Power Calculator

Enter any 2 values to calculate the missing variable

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) 

To calculate the pump power, divide the flow rate by 1714, then multiply by the pump presure.

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)

FAQ

What is PSIG and how does it relate to pump power calculation?

PSIG stands for Pounds per Square Inch Gauge. It is a unit of pressure relative to the surrounding atmosphere. In the context of pump power calculation, PSIG measures the pressure at which the pump operates. The pump pressure (PSIG) is a crucial factor in determining the pump’s power (horsepower), as it directly influences the amount of force the pump needs to exert to move the fluid at a given flow rate (GPM).

Why is the flow rate (GPM) important in calculating pump power?

The flow rate, measured in Gallons Per Minute (GPM), indicates how much fluid the pump can move in a minute. It’s an essential parameter in calculating pump power because it determines the volume of fluid the pump needs to handle. Together with the pump pressure (PSIG), the flow rate helps calculate the pump’s power requirement to move the specified volume of fluid against the given pressure.

Can pump power be calculated in units other than horsepower?

Yes, pump power can be calculated in various units, including kilowatts (kW) and watts (W), depending on the preference or industry standards. The formula provided calculates pump power in horsepower (hp), but this can be converted to other units using conversion factors. For example, 1 horsepower is approximately equal to 0.746 kilowatts. The choice of unit often depends on the scale of the operation and the standards used in the specific field or country.