Air Flow Rate Calculator

Air flow or cubic feet per minute (CFM) is an estimation of the measure of air per unit of time that passes through a specific medium (Eg. Pipe). It can be calculated based on the known values of cubic inch displacement, engine speed and volumetric efficiency.

Air Flow Rate (CFM) Calculation

inch3
rpm
ft3/min

Air flow or cubic feet per minute (CFM) is an estimation of the measure of air per unit of time that passes through a specific medium (Eg. Pipe). It can be calculated based on the known values of cubic inch displacement, engine speed and volumetric efficiency.

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Formula:

CFM= (CID * RPM * VE) / 3456 Where, CFM (Cubic Feet per Minute) = Air Flow Rate CID = Cubic Inch Displacement RPM = Engine Speed VE = Volumetric Efficiency

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