Reynolds Number Calculator

Reynolds Number (Re):

Density(ρ):

Velocity (v):

Characteristic Length (D):

Dynamic Viscosity (m²/s):

How This Is Calculated

$$ Re = \frac{\rho v D}{\mu} $$ where:

Re = Reynolds Number (Dimensionless)

ρ = Density (kg/m³)

v = Characteristic velocity (m/s²)

D = Characteristic Length (m)

μ = Dynamic Viscosity (m²/s)

Assumptions

The fluid is incompressible.
The fluid is Newtonian.
Steady flow conditions.
Flow is fully developed.

Related Calculators

Darcy Number

Froude Number

Mach Number

Weber Number

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