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Osmotic Pressure π = iMRT Calculator

π = iMRT — osmotic pressure driving water across membranes.

Calculates osmotic pressure and equivalent osmolarity of a solution from molarity, van't Hoff factor, and temperature.

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

Inputs

Results

Enter values and click Calculate to see results.
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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

π (atm) = i × M × 0.08206 × T

In depth

Calculates osmotic pressure and equivalent osmolarity of a solution from molarity, van't Hoff factor, and temperature.