Reynolds Number
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
Reynolds number
6.8474e+6
Turbulent flow
Velocity
100.00 m/s
360.00 km/h, 194.384 kt
Characteristic length
1.00 m
100.00 cm
Fluid
Air
using density and dynamic viscosity
Flow regime map
Reynolds number compares inertial forces with viscous damping, then maps the result to the flow regime.
Open Source and Easy to Use Elsewhere
This tool is open source and the underlying logic is fully transparent. You can inspect the code, understand the calculations, and contribute improvements. If you want to use the tool in your own website, course page, or learning platform, you can also embed it directly and start from a ready-made iframe setup for this exact tool.
Open source: review the implementation and see how the results are produced.
Embeddable: preview this tool, copy the iframe, and use it in your own site or LMS.