CFM Calculator

Calculate required airflow in CFM for a room based on room volume and target air changes per hour (ACH) per ASHRAE 62.1.

Calculate required airflow in CFM for a room based on volume and air changes per hour.

Length (ft)

Width (ft)

Height (ft)

Target air changes per hour (ACH)

Required CFM144CFM

Room Volume1,440cu ft

Formula: CFM = (room volume in cu ft x ACH) / 60. Source: ASHRAE 62.1 Ventilation for Acceptable Indoor Air Quality.

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