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Osmolarity from Three Solutes with van't Hoff Factor Calculator

Osmolarity = Σ iᵢ · cᵢ — particles per litre.

Compute the total osmolarity (osmol/L) of a solution containing up to three independent solutes, each with its own molar concentration cᵢ and van't Hoff factor iᵢ (number of particles each formula unit produces in solution; 1 for non-dissociating, 2 for NaCl, 3 for CaCl₂, etc.). Total = Σ iᵢ · cᵢ.

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

Inputs

M
M
M

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

Osmolarity = Σ iᵢ · cᵢ.

In depth

Compute the total osmolarity (osmol/L) of a solution containing up to three independent solutes, each with its own molar concentration cᵢ and van't Hoff factor iᵢ (number of particles each formula unit produces in solution; 1 for non-dissociating, 2 for NaCl, 3 for CaCl₂, etc.). Total = Σ iᵢ · cᵢ.