Reynolds Number Calculator

Calculate Reynolds number, velocity, diameter, or viscosity using Re = ρvD/μ. Features density units (kg/m³, g/cm³, kg/L), velocity units (m/s, cm/s, ft/s, km/h, mph), diameter units (m, cm, mm, in), and viscosity units (Pa·s, cP). Determines laminar (Re<2000), transitional, or turbulent (Re>4000) flow regimes. Perfect for fluid mechanics students.