billycalc

Rayleigh Number

Calculate Rayleigh Number instantly with the exact formula and a worked example. Free online calculator — no signup.

Rayleigh Number

Gr (Grashof)
Pr (Prandtl)
Ra (Rayleigh)
6,000,000
Ra = Gr·PrCalculate Rayleigh Number instantly with the exact formula and a worked example. Free online calculator — no signup.
Ra (Rayleigh)
6 000 000

More about: Rayleigh Number

What it calculates

The “Rayleigh Number” calculator computes Ra (Rayleigh) from 2 parameters: gr (grashof), pr (prandtl).

A standard physics formula used in educational and engineering tasks.

Example calculation

With parameters Gr (Grashof) = 1,000,000, Pr (Prandtl) = 6 the result is 6,000,000 (Ra = Gr·Pr).

How to use

  1. Enter the parameter values — every field above is adjustable with a slider.
  2. The result and related metrics are calculated automatically as you type.
  3. Use the additional metrics shown (if any) where needed.
  4. Copy the result or bookmark the page.

Related calculators