Reynolds Number Calculator

Reynolds Number Equation

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

Re = Reynolds Number (Dimensionless)

ρ = Density (kg/m³)

v = Characteristic velocity (m/s²)

D = Characteristic Length (m)

μ = Dynamic Viscosity (m²/s)

Calculator

Property to Calculate:

Reynolds Number (Re):

Density(ρ):

Velocity (v):

Characteristic Length (D):

Dynamic Viscosity (m²/s):

Equation Assumptions

Assumptions:

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