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Engineering

Pipe Flow Velocity

v = Q / A from flow rate and diameter

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Parameters

Results

Velocity v
0.42 m/s
Re (ν=1e-6)
21,221

How it works

Calculate fluid velocity in a pipe from volumetric flow rate and diameter.

Who it's for: Plumbing and process engineers sizing pipe runs.

v = Q/A with A = πD²/4.

Q converted from L/min to m³/s internally.

Also estimates Reynolds number at ν = 10⁻⁶ m²/s.

How to use

  1. Enter Flow rate Q (L/min) and Diameter D (mm).
  2. Read Velocity v and Re.

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