Reynolds Number Calculator

Flow Configuration

Flow Type

Pipe Diameter (D)

Fluid Properties

Fluid Type

Temperature

°C

Flow Velocity

Velocity (V)

m/s

Settings

Unit System

Show calculation steps

Show Re vs. Velocity graph

Show flow visualizations

Common Presets

Results & Analysis

Reynolds Number Result

Reynolds Number (Re)

--

Flow Regime

--

Input Summary

Flow Type: --

Characteristic Length: --

Fluid: --

Temperature: --

Density: --

Dynamic Viscosity: --

Kinematic Viscosity: --

Velocity: --

Welcome to the Reynolds Number Calculator

Use the form on the left to calculate the Reynolds number for your fluid flow scenario.

Multiple Flow Types

Calculate for pipe flow, external flow, or open channels.

Fluid Database

Built-in properties for common fluids or customize your own.

Visual Analysis

See flow visualizations and dynamic graphs of results.