My Cart
Your Cart 0

    Your cart is empty.

  • Total (Amount) ₹0.00
Mechanical Engineering

Prandtl Number (Pr) Calculator

Mechanical Engineering

GATE Verified formulaSI defaultsCompatible units
Scan another formula
Help us keep answers accurate

Report a formula or result issue

Tell us what looks wrong and, if possible, include the expected answer, unit or calculation step. Our content team will review it.

Prandtl Number (Pr)

Equation and meaning

\[Pr = \frac{Momentum_{diffusivity\_through\_the\_fluid}}{Thermal_{diffusivity\_through\_the\_fluid}}\]

Use this equation when the shown variables describe your problem. Keep all inputs in compatible units; the calculator converts them to SI internally before solving.

Variables in this formula

Momentum_diffusivity_through_the_fluid — Momentum Diffusivity Through The Fluid
Enter this value unless it is the selected unknown.
Pr — Pr
Enter this value unless it is the selected unknown.
Thermal_diffusivity_through_the_fluid — Thermal Diffusivity Through The Fluid
Enter this value unless it is the selected unknown.

How to use this calculator

  1. Leave one value emptyThe empty field is automatically treated as the unknown.
  2. Enter known values and unitsChoose N, kgf, dyn, SI or another compatible unit when available.
  3. Review the automatic answerThe result appears immediately and is substituted back into the formula to check the residual.
Keep learning
View Mechanical Engineering formulas
Civil Engineering

Vane Shear Test

Civil Engineering

\[S = \tau\]
Open calculator Electrical Engineering

Airgap power for a shunt motor

Electrical Engineering

\[P_{e} = \omega \cdot T\]
Open calculator Mechanical Engineering

Absolute Humidity in Psychrometry

Mechanical Engineering

\[Absolute_Humidity = ( ( Weight_of_Water_Vapour ) / ( Volume_of_Air \cdot ( Mixture ) ) )\]
Open calculator Mechanical Engineering

Absorptivity

Mechanical Engineering

\[A \cdot bsorptivity \cdot \alpha = \frac{Energy_{absorbed} \cdot Q_{a}}{T_{otal\_incident\_radiation} \cdot Q}\]
Open calculator Civil Engineering

Active earth pressure at depth H

Civil Engineering

\[P_p = q - 2 \cdot C\]
Open calculator Mechanical Engineering

Addendum circle diameter of helical gear

Mechanical Engineering

\[d_{a} = \frac{z \cdot m_{n}}{cos} + 2 \cdot m_{n}\]
Open calculator