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Duct Pressure Drop

Darcy–Weisbach duct pressure drop with a K-factor fittings library and air property calculations.

Airflow & duct

m³/s
m

Duct geometry

mm
mm

Material & air

mm
°C
kPa

Fittings

FittingQtyEffective K
No fittings added yet
0 fittingsΣK = 0.00
Enter airflow and duct length
ensign.software · 28 October 2026The Ensign Toolbox