Skuti Science Free scientific calculators & converters

Weak Acid / Base pH Calculator

pH of a weak acid or weak base solution from its concentration and Ka/Kb (or pKa/pKb), solved exactly.

Results

pH—
[H⁺] or [OH⁻]—
Degree of dissociation—

How to use the Weak Acid / Base pH Calculator

  1. Enter or select: Type, Concentration, pKa or pKb.
  2. The results (pH, [H⁺] or [OH⁻], Degree of dissociation) are calculated instantly as you type.
  3. Use “Copy link” to share the calculation with the same input values.

Formula

  • K = x²/(c − x) ⇒ x = (−K + √(K² + 4Kc))/2