Pipe Velocity Calculator

Pipe Velocity Calculator: Find Average Gas Velocity in a Duct

Knowing the average velocity of gas moving through a pipe or duct is essential for checking erosion limits, noise criteria, and Reynolds number, and for sizing equipment correctly. This calculator computes velocity directly from volumetric flow rate and cross-sectional area.

The Formula

Velocity = Flow Rate / Area

Worked Example

Gas flows at 3.0 m3/s through a duct with a 0.2 m² cross-section.

Velocity = 3.0 / 0.2 = 15 m/s

How to Use This Calculator

1. Enter the volumetric flow rate in m3/s.
2. Enter the pipe or duct cross-sectional area in m².
3. Click Calculate to get the average gas velocity.

Related Calculations

Feed the result into the Reynolds Number Calculator to check the flow regime.