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← Engineering Tools
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Reynolds Number Calculator
Calculate Reynolds number for fluid flow in pipes.
Fluid presets:
Water (20°C)
Oil (SAE 30)
Air (20°C, 1 atm)
Steam (10 bar)
Flow Velocity
m/s
ft/s
Pipe Inner Diameter
mm
in
Fluid Density
kg/m³
Dynamic Viscosity
Pa·s
cP
Re = ρvD/μ
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