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Home › Calculators › Pipe Friction Loss › Calculator

Pipe Friction Loss Calculator (Darcy-Weisbach)

ΔP = λ · (L / D) · (ρ · v² / 2)  —  λ via Colebrook-White iteration
1. Pick Fluid
 
2. Pick Pipe Material
3. Enter Geometry & Flow
mm
m
m³/h
Cold water: volumetric flow (m³/h). Air/Steam: mass flow (kg/h).
Resolved Fluid Properties
Fluid Preset--
Density ρ--
Kinematic Viscosity ν--
Roughness ε--
Intermediate Values
Pipe Cross-Section A--
Flow Velocity v--
Reynolds Number Re--
Flow Regime--
Friction Factor λ--
Method--
Pressure Drop Results
ΔP (Pa)--
ΔP (kPa)--
ΔP (bar)--
Head Loss hf (mH2O)--
Specific Resistance R (Pa/m)--
ΔP per 100 m (Pa)--