Normality Calculator

About this calculator

This calculator finds a solution's normality (N) — a concentration unit that accounts for how many reactive units a molecule contributes to a reaction: N = Molarity × number of equivalents per mole. The "equivalents" depend on the reaction type: for acids and bases, it's the number of H⁺ or OH⁻ ions per molecule (so 1 M H₂SO₄ is 2 N, since sulfuric acid donates 2 protons); for redox reactions, it's the number of electrons transferred.

Analytical chemists use normality in titrations because it lets equal volumes of two normal solutions react completely with each other regardless of the specific acid or base involved, simplifying stoichiometry calculations in labs — particularly in acid-base titrations, redox titrations, and volumetric analysis. Enter the molarity and the number of equivalents per mole to get the normality.