basic

Equivalent Weight Calculator

Equivalent weight of an acid, base, or salt.

Compute the equivalent weight (also called gram-equivalent) of a substance from its molecular weight and its valence factor (n-factor) — the number of replaceable H⁺, OH⁻, or electrons exchanged.

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

Inputs

g/mol

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

Equivalent weight = molecular weight / valence factor (n)

In depth

Compute the equivalent weight (also called gram-equivalent) of a substance from its molecular weight and its valence factor (n-factor) — the number of replaceable H⁺, OH⁻, or electrons exchanged.