Pneumatic Tubing Calculator

Size pneumatic tubing by calculating velocity, pressure drop, burst pressure (Barlow's formula), and recommended OD for air systems.

Air flow (SCFM)

Line pressure (PSI)

Tube run length (ft)

Allowable pressure drop (PSI)

Tube OD (in)

Wall thickness (in)

Material (1=nylon, 2=PU, 3=copper, 4=steel)

Number of fittings

Tab to move between fields

Air velocity (ft/s)

31.3

Total pressure drop (PSI)329.82

Burst pressure (PSI)2,080

Max working pressure (PSI)520

Tube ID (in)0.37

Recommended tube OD (in)0.63

Actual CFM (compressed)1.4

Straight-run drop (PSI)249.87

Velocity OkNo

Drop OkNo

How to Use This Calculator

Enter Air flow (SCFM), Line pressure (PSI), and Tube run length (ft).
Set Allowable pressure drop (PSI), Tube OD (in), and Wall thickness (in).
Adjust Material (1=nylon, 2=PU, 3=copper, 4=steel), Number of fittings as needed.
Review the Air velocity (ft/s) result.
Use Total pressure drop (PSI) and Burst pressure (PSI) to inform your decision.

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