CalculatorHand-checked fixturesFull working shown
Buffer pH Calculator (Henderson–Hasselbalch)
pH of a conjugate acid/base pair — moles or concentrations work equally since the volume cancels.
Calculator
Results update as you type. Every step of the working is shown below.
Examples:
Result
Enter values above — the answer appears here instantly, with full working.
Formula used
pH = pKa + log₁₀(n_base / n_acid)
Every result substitutes your values into this relation step by step above.
Assumptions
- Both buffer components present in significant amount (ratio 0.1–10).
- x (ionization) negligible relative to the analytical amounts.