Enter the volumetric flow rate and the cross-sectional area into the calculator to determine the velocity.

Flow to Velocity Formula

The following equation is used to calculate the Flow to Velocity.

V = Q / A
  • Where V is the velocity (m/s)
  • Q is the volumetric flow rate (m^3/s)
  • A is the cross-sectional area containing the flow (m^2)

To calculate the velocity from flow, divide the volumetric flow rate by the cross-sectional area.

What is Flow to Velocity?


Flow typically measures fluid volume moving through an enclosed space per unit of time. To convert this value into velocity, you must know the cross-sectional area of that enclosed space.

How to Calculate Flow to Velocity?

Example Problem:

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

First, determine the volumetric flow rate. In this example, the volumetric flow rate is found to be 50 m^3 / s.

Next, determine the cross-sectional area containing the flow. For this problem, the area is found to be 10 m^2.

Finally, calculate the velocity from flow using the formula above:

V = Q / A

V = 50 / 10

V = 5 m/s