Darcy-Weisbach Calculator

Calculate pipe friction head loss using Darcy-Weisbach equation with Moody friction factor for laminar and turbulent flow.

Average fluid velocity in the pipe.
m/s
Internal diameter of the pipe.
mm
Length of the pipe section.
m
Steel: 0.045, Cast iron: 0.26, PVC: 0.0015 mm.
mm
Water: 998, Oil: 850-900 kg/m³.
kg/m³
Water@20°C: 0.001 Pa·s.
Pa·s

Results

Reynolds Number-
Friction Factor f-
Head Loss-m
Pressure Drop-kPa
References: Munson — Fluid Mechanics; Colebrook Equation