Reynolds Number Calculator

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Calculate the Reynolds number for fluid flow, which determines whether the flow is laminar, transitional, or turbulent.

Using density (ρ) and dynamic viscosity (μ)

Flow Properties

Fluid Properties

kg/m³
kg/(m·s)

Reynolds Number Results

Enter parameters to calculate Reynolds number

Open Source & Transparent

This tool is open source and the underlying logic is fully transparent. You can view the source code, understand the calculations, and even contribute improvements to make it better for everyone.

View Source Code