Duct Velocity Calculator
Enter the airflow and the duct size to get actual air velocity in FPM, velocity pressure, and a check against the recommended band for the application.
Section Parameters
Round, rectangular or flat oval sections.
Velocity Results
Enter valid positive dimensions and airflow, then select Calculate.
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Important Disclaimer
This calculator is for preliminary design guidance only. Final duct sizing, construction, and installation must be performed by qualified professionals and comply with applicable codes and standards.