Reynolds Number

Calculate the Reynolds number and determine whether flow is laminar or turbulent.

Fluid Density (kg/m³)

Velocity (m/s)

Characteristic Length (m)

Dynamic Viscosity (Pa·s)

About this calculator

Calculates the Reynolds number (Re = ρvD/μ) from fluid density, velocity, characteristic length and viscosity, and classifies the flow as laminar, transitional or turbulent.