basic

Graham's Law of Effusion Calculator

Effusion-rate ratio of two gases from molar masses.

Compute the ratio of effusion (or diffusion) rates of two gases at the same temperature and pressure using Graham's law: rate1 / rate2 = √(M₂ / M₁).

Dr. Helena Ortiz By Dr. Helena Ortiz
Published Last reviewed 1 min read

Inputs

g/mol
g/mol

Results

Enter values and click Calculate to see results.
Was this helpful?

How to use this calculator

  1. Fill in the inputs above using the units you already have.
  2. Values update automatically as you type — no submit button needed.
  3. Hover any result row for the underlying formula and intermediate values.

Formula

rate₁ / rate₂ = √(M₂ / M₁)

In depth

Compute the ratio of effusion (or diffusion) rates of two gases at the same temperature and pressure using Graham's law: rate1 / rate2 = √(M₂ / M₁).