Paint Booth Airflow Calculator

Calculate required CFM, air velocity, fan sizing, and OSHA compliance for spray paint booths based on booth dimensions and type.

Booth width (ft)

Booth height (ft)

Booth length (ft)

Booth type (1-3)

Target velocity (FPM)

Filter efficiency (%)

Exhaust duct diameter (in)

Tab to move between fields

Required airflow (CFM)

12,000

Estimated fan HP

5.4

Cross-section area (sq ft)120

Air changes per hour250

Booth volume (cu ft)2,880

Duct velocity (FPM)3,820

Static pressure (in WG)1.86

Airflow DirectionCross-Draft

Duct Velocity OkYes

Meets OshaYes

How to Use This Calculator

Enter Booth width (ft), Booth height (ft), and Booth length (ft).
Set Booth type (1-3), Target velocity (FPM), and Filter efficiency (%).
Adjust Exhaust duct diameter (in) as needed.
Review Required airflow (CFM) and Estimated fan HP.
Use Cross-section area (sq ft) and Air changes per hour to inform your decision.

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