This duct pressure drop calculator is a tool to assist in estimating the pressure drop in an HVAC ducts.


⬇️ Inputs

Density of Air (kg/m3)

Air Stream Velocity (m/s)

Loss Coefficient

⬆️ Outputs

Velocity Pressure

Pressure Loss


Duct system pressure drop is calculated using the velocity pressure of the duct and the loss coefficient for the particular duct components. The ducts velocity pressure is calculated using the density of air flowing through the duct and the velocity of this air stream.


To calculate the velocity pressure we use the following equation:


Additional Resources

For some more HVAC calculations, why not take a look at some of our other HVAC calculators?
  1. 🔗 Rate of Ventilation (Occupancy Method)
  1. 🔗 Rate of Ventilation (Area Method)
  2. 🔗 Air Duct Velocity

💬 Got 1min to provide feedback on this template? Click here