Duct
Calculate a result, save it as your baseline, then change the inputs to compare.
HVAC Air Flow
Convert volumetric air flow instantly.
Air Velocity
Velocity = volumetric air flow ÷ free cross-sectional area.
Rectangular Duct Area
Internal cross-sectional area, not sheet-metal surface area.
Round Duct Area
Use the internal diameter of the duct.
Engineering Note: These tools are intended for quick reference and estimation. Verify final engineering selections, equipment sizing and code compliance according to project specifications and applicable UAE/international standards.
Unit factors follow NIST SI conversion references. Formulas & assumptions