Duct Velocity Calculator, Formula, Duct Velocity Calculation

Duct Velocity Calculator:

Enter the values of Volumetric Flow Rate of the air from the duct CFM_(Ft³_/minute) & Cross-sectional Area A_(Feet²₎  to determine the value of Duct Velocity V_(FPM) .

Duct Velocity Formula:

The Duct Velocity V_(FPM) in Feet Per Minute is equal to the Volumetric Flow Rate of the air from the duct CFM_(Ft³_/minute) in Feet cubic per minute is divided by the Cross-sectional Area A_(Feet²₎ in feet square.

The Formula of Duct Velocity can be writtern as,

V_(FPM) = CFM_(Ft³_/minute) / A_(Feet²₎

Here,

V_(FPM) = Duct Velocity in Feet Per Minute

CFM_(Ft³_/minute) = Volumetric Flow Rate of the air from the duct in Feet cubic per minute

A_(Feet²₎ = Cross-sectional Area in feet square

Calculation for Duct Velocity:

1)Determine the Duct Velocity and given for Volumetric Flow Rate = 1,000 ft³/min , Cross-sectional Area = 5 ft².

Solution

V = CFM / A

V = 1000 / 5

V = 200FPM.

2)Determine the Cross-sectional Area and given for Volumetric Flow Rate = 1,000 ft³/min , Duct Velocity = 200FPM.

Solution

V = CFM / A

200 = 1000 / A

A = 5ft².

Duct Calculation Explained: