Pressure Drop Calculator

System pressure drop from pipe, fittings, and filters.

Air flow (CFM free air)

Pipe inside diameter (in)

Total equivalent length (ft)

Supply pressure (psig)

Number of filters

Number of dryers

Tab to move between fields

Total pressure drop (psi)

15.45

Delivered pressure (psig)

84.5

Pipe friction drop (psi)6.45

Component drop (psi)9

Drop as % of supply15.5

Pipe velocity (ft/s)9.2

Energy penalty (%)7.7

How to Use This Calculator

Enter the pipe inside diameter in inches and pipe length in feet.
Set the volumetric flow rate in CFM and system pressure in PSI.
Input air temperature and pipe roughness factor for your pipe material.
Review the calculated pressure drop in PSI.
If drop exceeds 10% of working pressure, increase pipe diameter or reduce run length.

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