Enter the flow through the orifice and the orifice area into the calculator to determine the orifice velocity.

Orifice Velocity Formula

The following equation is used to calculate the Orifice Velocity.

VO = OF / OA

  • Where VO is the orifice velocity (m/s)
  • OF is the orifice flow rate (m^3/s)
  • OA is the orifice area (m^3)

What is an Orifice Velocity?


An orifice velocity is a measure of the velocity of fluid moving through an orifice.

How to Calculate Orifice Velocity?

Example Problem:

The following example outlines the steps and information needed to calculate Orifice Velocity.

First, determine the orifice area. In this example, the orifice area is found to be 2 m^2.

Next, determine the orifice flow rate. In this case, the orifice flow rate is measured to be 50 m^3/s.

Finally, calculate the Orifice Velocity using the formula above:

VO = OF / OA

VO = 50 / 2

VO = 25 m/s