Air Velocity Calculator
Calculate the air speed velocity in ductwork or diffusers based on volumetric flow rate (CFM) and dimensions.
CFM
5015000
in
3120
in
3120
Calculated Velocity
Duct Cross-Sectional Area
1.000 sq ft
Duct Cross-Sectional Area
0.093 sq m
Air Velocity (FPM)
1,000 FPM
Air Velocity (M/S)
5.08 m/s
Duct Design Guideline: Keep duct velocity between 800 - 1200 FPM for commercial branch lines, and 1200 - 1800 FPM for main supply trunks to minimize noise and static pressure resistance.