Interactive Moody Chart
Calculate the Darcy-Weisbach friction factor using the Colebrook-White equation. Your operating point is plotted on an interactive Moody diagram.
Input Parameters
Laminar < 2300, Transition 2300-4000, Turbulent > 4000
Commercial steel: ~0.0015, Smooth: ~0.0001
Darcy Friction Factor
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Fanning Factor (f/4)
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Flow Regime
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Moody Diagram
How this was calculated
Colebrook-White equation: 1/sqrt(f) = -2 log10( (ε/D)/3.7 + 2.51/(Re*sqrt(f)) ). Solved iteratively.
Laminar flow (Re < 2300): f = 64/Re
Smooth pipe limit: As ε/D approaches 0, the Colebrook equation reduces to the Prandtl equation.
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Book a free strategy call →Understanding the Moody Chart
The Moody chart (1944) is the most widely used diagram in fluid mechanics for determining the Darcy-Weisbach friction factor in pipe flow. It plots friction factor versus Reynolds number for various relative roughness values, covering laminar, transition, and turbulent flow regimes. The chart is based on the Colebrook-White equation for turbulent flow and f = 64/Re for laminar flow.
In petroleum engineering, accurate friction factor calculation is essential for pipeline sizing, artificial lift design, wellbore pressure loss calculation, and facilities design. Built by Groundwork Analytics.