CIVIL ENGINEERING · FLUID MECHANICS

Reynolds Number Calculator.

Calculate the Reynolds number from density, velocity, characteristic diameter and dynamic viscosity.

Calculate Re

Density ρ (kg/m³)Velocity V (m/s)Diameter D (m)Dynamic viscosity μ (Pa·s)

Enter values and calculate the Reynolds number.

The flow classification shown is the common reference for internal pipe flow and should be interpreted in context.