Flow Rate Pressure Calculator

Enter the initial pressure, density, initial velocity, and final velocity of a fluid moving through a constrained volume to calculate the final pressure.

Flow Rate Pressure Formula

The following formula is used to calculate the final pressure of a fluid moving through a duct.

P2 = P1 * .5* p * (v2^2-v1^2)

  • Where P2 is the final pressure
  • P1 is the initial pressure
  • V2 is the final velocity
  • V1 is the initial velocity.
  • p is the density.

Flow Rate Pressure Definition

A flow rate pressure is defined as the pressure differential that arises from the flow of a fluid through a constrained area.

Flow Rate Pressure Example

How to calculate flow rate pressure?

  1. First, determine the initial pressure.

    Calculate or measure the initial/inlet pressure.

  2. Next, measure the initial and final velocities.

    Calculate or measure the velocities at the start and end of the fluid flow.

  3. Next, calculate the density.

    Determine the density of the fluid.

  4. Finally, calculate the final pressure.

    Calculate the final pressure using the equation above.


What is a flow rate pressure?

A flow rate pressure is a pressure caused by the movement of a fluid.

flow rate pressure calculator
flow rate pressure formula