Duct Calculator (Ductulator)

Airflow Rate:


CFM

Maximum Air Velocity:


FPM

Max. Static Loss/100ft:



InWg

Round duct:
“Ø 748 FPM 0.059 inWg/100ft
Rectangular duct:
“x“ 686 FPM 0.055 inWg/100ft
“x“ 720 FPM 0.064 inWg/100ft
“x“ 720 FPM 0.071 inWg/100ft
“x“ 686 FPM 0.078 inWg/100ft

How to use?

  1. Select Duct Type: Choose the shape of your duct. This might affect the input fields for dimensions.
  2. Enter Dimensions: Input the dimensions of your duct based on the type selected. Ensure these values are in the correct units (inches, cm, etc.).
  3. Specify Air Flow: Enter the air flow rate. The unit (like CFM) should match your project’s requirements.
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