Ductulator Calculator

Air duct also termed as ductulator is a passage that is used to provide fresh air into rooms, buildings etc., Air ducts may be in circular, square and in rectangular shapes. This online air duct calculator is used to calculate the velocity of air flow feet per minute (FPM), and feet per second (FPS) through any shaped (circle, square or rectangle) ductulator with either diameter, sides or area.

Air Duct Velocity Calculator

cfm
in
fpm
fps

Air duct also termed as ductulator is a passage that is used to provide fresh air into rooms, buildings etc., Air ducts may be in circular, square and in rectangular shapes. This online air duct calculator is used to calculate the velocity of air flow feet per minute (FPM), and feet per second (FPS) through any shaped (circle, square or rectangle) ductulator with either diameter, sides or area.

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Formula:

Ductulator Velocity = ( 576 * Air Flow in CFM ) / (3.14 * Diameter2) When diameter is given Ductulator Velocity = ( 576 * a ) / ( Side1 * Side2 * 4) When sides are given Ductulator Velocity = Air Flow in CFM / Cross Sectional Area When Area is given

Example

The velocity of an air duct with area 16 sq.ft and air flow of 10 CFM would be :
V = 10 / 16 = 0.625 FPM
When converted to FPS, it is 0.0104 FPS

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