Professional Duct Sizing Calculator
SMACNA Compliant Ductwork Calculations
About This Tool
This advanced calculator helps HVAC professionals determine:
- ✓ Proper duct sizing for airflow
- ✓ Pressure drop calculations
- ✓ Round/Rectangular duct conversions
- ✓ Friction rate adjustments
Based on SMACNA standards with modern HVAC system requirements.
Duct Diameter
0 in
Velocity Pressure
0 in WG
Friction Rate
0.1 in/100ft