// multi-utility computation suite · offline · instant · precise
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eng.pipe-friction-factor-colebrook Calculator
Calculates the Darcy friction factor for turbulent pipe flow by iteratively solving the Colebrook-White equation. The Colebrook equation is implicit in f — the Swamee-Jain explicit approximation avoids iteration with less than 3% error.
Reference formula or conversion factor shown for context.
Pipe Diameter M
Internal diameter of the pipe. Larger diameter reduces velocity and pressure drop but increases material cost.
Pipe Length M
Linear measurement. Ensure consistent units: 1 m = 1,000 mm = 3.281 ft.
Results
Darcy friction factor f
A dimensionless multiplier applied in the calculation.
flow regime
Whether the flow is laminar (smooth, ordered) or turbulent (chaotic). Determined by the Reynolds number: below 2,300 = laminar; above 4,000 = turbulent.
head loss (m) per m/s flow
The decrease or degradation from the baseline.
Swamee-Jain: explicit Colebrook approx
Sample size or count used in the calculation.
smooth pipe f
Reference formula or conversion factor shown for context.
Moody chart
Reference formula or conversion factor shown for context.