🔬 Reynolds Number Calculator

Reynolds Number Calculator for Flow Regime Analysis

Reynolds Number (Re) Calculation

Re = (ρ × V × D) / μ = (V × D) / ν

Velocity (V) [m/s]

Pipe diameter (D) [mm]

Fluid

Kinematic viscosity (ν) [m²/s]

Re < 2,300

Stable flow in which the fluid moves in parallel layers

2,300 ≤ Re ≤ 4,000

Unstable flow mixing laminar and turbulent behavior

Re > 4,000

Complex flow forming irregular eddies