This duct velocity and air flow calculator, you will be able to quickly and easily determine the velocity of the air in a ducted system, allowing you to make informed decisions when designing and installing an HVAC system.


⬇️ Inputs

Duct Area

Volumetric Flow Rate (m3/s)

⬆️ Outputs

Velocity (m/s)

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Air duct velocity is the speed at which air moves through an air duct. It is usually measured in feet per minute (fpm) or meters per second (m/s). The following equation calculates the velocity of air in a duct based on the volumetric flow rate and the cross-sectional area of the duct.

It can be modelled with this equation:


Additional Resources

If you're looking for more HVAC calculations, why not take a look at some of our other HVAC calculators?
  1. 🔗 Duct System Pressure Drops
  2. 🔗 Rate of Ventilation (Occupancy Method)
  3. 🔗 Rate of Ventilation (Area Method)