basic

Ionic Strength of an Electrolyte Solution Calculator

I = ½ · Σ cᵢ · zᵢ² — supports up to four ionic species.

Compute the ionic strength I of a multi-electrolyte solution from up to four ions: I = ½ · Σ cᵢ · zᵢ², where cᵢ is the molar concentration of ion i and zᵢ is its charge.

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

Inputs

mol/L
mol/L
mol/L
mol/L

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

I = ½ · Σ cᵢ · zᵢ²

In depth

Compute the ionic strength I of a multi-electrolyte solution from up to four ions: I = ½ · Σ cᵢ · zᵢ², where cᵢ is the molar concentration of ion i and zᵢ is its charge.