Airflow CFM Calculator
Required airflow in CFM and m³/h from room volume and air changes per hour.
Inputs
ACH
Results
- Airflow
- 318 CFM
- Airflow
- 540 m³/h
- Room volume
- 90 m³
Formula
CFM = Volume (ft³) × ACH ÷ 60
Assumptions & limits
- Typical ACH: homes 4–6, offices 6–8, kitchens 15+, workshops 6–12.
Worked example
90 m³ = 3,178 ft³ × 6 ÷ 60 = 318 CFM (540 m³/h).