Cleanroom Classification Calculator
Calculate particle count limits by ISO 14644-1 cleanroom class with EU GMP grade mapping.
Inputs
Results
Max particles/m³
351,676
Max particles/ft³9,958
Limit at 0.5 µm (/m³)351,676
Limit at 5.0 µm (/m³)2,925
Required airflow (CFM)1,177
Compliance margin (%)100
Passes spec (1=yes, 0=no)1
Max At1um83,176.38
Eu Gmp GradeC (in operation)
How to Use This Calculator
- Select your ISO class (1–9) and the particle size threshold (µm) to evaluate.
- Enter room volume (m³) and your HVAC air changes per hour.
- Optionally enter a measured particle count per m³ to check compliance.
- Review Max Particles/m³, Required Airflow (CFM), and Compliance Margin (%).
- A positive compliance margin confirms your room is within the ISO class limit.
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