Airflow for air changes calculator
Convert a specified air-change target into required airflow.
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Your measurements
Enter your project values. Your estimate updates as you type.
View your estimateExample values are a starting point. Check product yields and specifications before ordering.
YOUR ESTIMATE
Airflow required
345.6m³/h
Room volume57.6 m³
Calculated from your measurements.
How it's calculated
Airflow (m³/h) = room length × width × height × air changes per hour. One CFM ≈ 1.699 m³/h.
Calculations use consistent units for your selected measurements. Whole purchase quantities are rounded up.
What this estimate includes
The target is an input, not a recommended ventilation rate. Actual fan selection also depends on pressure losses and the design.
Quantity and arithmetic estimates only. Use project specifications for installation and design requirements.
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