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Mechanical Engineering

Poiseuille’s Equation Calculator

Mechanical Engineering

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Poiseuille’s Equation

Equation and meaning

\[V = \frac{\pi \cdot P \cdot {r}^{4}}{8 \cdot \eta \cdot l}\]

Poiseuille’s Formula

Variables in this formula

eta — Eta
Enter this value unless it is the selected unknown.
l — L
Enter this value unless it is the selected unknown.
P — Power
Power SI unit: W
r — Radius
Radius SI unit: m
V — Voltage
Voltage SI unit: V

How to use this calculator

  1. Leave one value emptyThe empty field is automatically treated as the unknown.
  2. Enter known values and unitsChoose N, kgf, dyn, SI or another compatible unit when available.
  3. Review the automatic answerThe result appears immediately and is substituted back into the formula to check the residual.
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