Discover the importance of Cubic Feet per Minute (CFM) with our easy-to-use calculator. Accurately determine air flow for HVAC, ventilation, or any system requiring precise air volume measurement. Understand how duct size and air velocity impact air distribution efficiency and indoor air quality. Get instant results for your projects!
Formula:
The primary formula to calculate CFM (Cubic Feet per Minute) is:
CFM = Area (ft²) × Air Velocity (FPM)
Where:
- CFM = Cubic Feet per Minute (volume of air moved per minute)
- Area (ft²) = Cross-sectional area of the duct or opening in square feet. If dimensions are in inches, it's calculated as (Width (in) × Height (in)) / 144.
- Air Velocity (FPM) = Air speed in Feet per Minute
Our calculator simplifies this by taking dimensions in inches:
CFM = (Width (in) × Height (in) / 144) × Air Velocity (FPM)