CFM to L/s and m³/h Airflow Converter
Airflow is specified in CFM in the US, L/s in Canadian and many metric ventilation documents, and m³/h on European equipment.
Free tool
Result
Enter values to calculate.
Formula
- 1 CFM = 0.4719 L/s
- 1 CFM = 1.699 m³/h
- 1 L/s = 3.6 m³/h
Example calculation
400 CFM = 188.8 L/s = 679.6 m³/h.
Practical HVAC use
Translate ventilation requirements, HRV/ERV ratings and blower tables between unit systems.
Common mistakes
- Rounding 1 CFM to 0.5 L/s on large systems — the error grows quickly.
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Unit Converter
FreeFree engineering unit converter for HVAC: pressure, temperature, airflow, BTU/h, kW, tons, energy, torque, R-value, microns and more — metric and imperial.
Educational tool. Results are estimates from the stated formulas; always confirm with manufacturer data and the code adopted in your jurisdiction. All calculators