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Friction Factor Calculator

Find the laminar Darcy friction factor from Reynolds number.

Friction factor 0.0427

Formula: Laminar: f = 64 ÷ Re

Step-by-step with your numbers:
1. Values used:
2. Reynolds number = 1,500
3.
4. Friction factor = 0.0427
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The friction factor quantifies pipe friction for the Darcy–Weisbach equation.

The math behind it

For laminar flow (Re < 2300), f = 64 ÷ Re. Turbulent flow needs the Colebrook equation or Moody chart.

Worked example

Re = 1500 → f ≈ 0.0427.

FAQ

When is flow laminar?

Below a Reynolds number of about 2300 in a pipe.

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