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Henderson-Hasselbalch Buffer Capacity Calculator

β = 2.303 C Ka[H⁺] / (Ka + [H⁺])² — Van Slyke equation.

Calculates the buffer capacity β (mol/L per pH unit) using the Van Slyke equation. Maximum buffer capacity occurs at pH = pKa.

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

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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

β = 2.303 × C × Ka × [H⁺] / (Ka + [H⁺])²; [H⁺] = 10^(−pH)

In depth

Calculates the buffer capacity β (mol/L per pH unit) using the Van Slyke equation. Maximum buffer capacity occurs at pH = pKa.