Prandtl Number Calculator

Calculate the Prandtl Number, a dimensionless number representing the ratio of momentum diffusivity (kinematic viscosity) to thermal diffusivity. Used in heat transfer and convection calculations.

Calculator

Inputs

Dynamic Viscosity (μ) (lbm/(ft hr))

Specific Heat (cp) (Btu/lbm°F)

Thermal Conductivity (k) (Btu/(h ft²°F/ft))

Results

Prandtl Number (Pr)-- dimensionless

Fluid Type	Prandtl Number Range
Gases	0.7 - 1.0
Water	1 - 10
Liquid Metals	0.001 - 0.03
Oils	50 - 2000