Flow Resistance Calculator - Poiseuille's Law

Flow-Resistance flow rate calculator

Dynamic Viscosity (μ):

Pipe Length (l):

Radius of the Pipe (r):

Calculated Flow Resistance (R) in Pa⋅s/mm³:

Calculated Flow Resistance (R) in Pa⋅s/cm³:

Calculated Flow Resistance (R) in Pa⋅s/dm³:

Calculated Flow Resistance (R) in Pa⋅s/m³:

Calculated Flow Resistance (R) in Pa⋅s/cu in:

Calculated Flow Resistance (R) in Pa⋅s/cu ft:

Calculated Flow Resistance (R) in Pa⋅s/cu yd:

Calculated Flow Resistance (R) in Pa⋅s/ml:

Calculated Flow Resistance (R) in Pa⋅s/cl:

Calculated Flow Resistance (R) in Pa⋅s/l:

To calculate the flow resistance of a pipe using Poiseuille's Law, use the following formula:

R = (8 × μ × l) ÷ (π × r⁴)

Where:

Use the form above to input the values, and the calculator will provide the required flow resistance.

Viscosity (μ) in Pa⋅s	Pipe Length (l) in meters	Radius (r) in meters	Flow Resistance (R) in Pa⋅s/m³
0.001	1	0.01	2.546
0.005	1	0.02	0.637
0.001	0.5	0.005	0.636

For more details on Poiseuille's Law and flow resistance, refer to:
https://en.wikipedia.org/wiki/Hagen%E2%80%93Poiseuille_equation

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