Enter the specific heat capacity, dynamic viscosity, and thermal conductivity into the calculator to determine the Prandtl number.

## Prandtl Number Formula

The following formula is used to calculate the Prandtl number of a system.

P = n * Cp / Tc

- Where P is the Prandtl number
- n is the dynamic viscosity (kg*m^-1*s^-1)
- Cp is the specific heat capacity (J*kg^-1*K^-1)
- Tc is the thermal conductivity (W*m^-1*K^-1)

## Prandtl Number Definition

A Prandtl number is a ratio of the momentum of diffusivity to thermal diffusivity.

## Prandtl Number Example

How to calculate Prandtl number?

**First, determine the dynamic viscosity.**Calculate the dynamic viscosity.

**Next, determine the specific heat capacity.**Calculate specific heat capacity.

**Next, determine the thermal conductivity.**Calculate the thermal conductivity.

**Finally, calculate the Prandtl number.**Calculate the Prandtl number using the formula above.

## FAQ

**What is a Prandtl number?**

The Prandtl number is a ratio of momentum diffusivity to thermal diffusivity.

**What is momentum diffusivity?**

Momentum diffusivity is the measure of a fluid’s resistance to movement. In other words, another way of say viscosity.