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Airflow Conversion

Airflow Unit Conversion Calculator

Convert between air velocity and volume airflow based on duct size. Enter your values below to calculate.

1. Select Duct Shape & Size

Choose the shape of your tubing or piping and enter dimensions.

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2. Enter Known Value

Results

Velocity Conversions
ft/min (LFM)
m/s
miles/hr (MPH)
Volume Flow Conversions
ft³/min (CFM)
m³/hr
L/s
Example Calculation: Select "Circular Tubing", enter Radius 2 in. Enter Airflow Value 400 and select LFM. Click Calculate to see the result: 34.91 CFM.