Henderson-Hasselbalch Calculator
ChemistryCalculates the pH, pKa, or the ratio of acid and conjugate base concentrations using the Henderson-Hasselbalch equation. This equation is commonly used in chemistry, biology, and medicine to estimate the pH of a buffer solution.
How to use this calculator
Start with your values, or try a preset.
Enter pH, pKa, [A-]/[HA] Ratio, and Solve For in the units shown.
Read Calculated [A-]/[HA] Ratio, Calculated pKa, Calculated pH, and Result in the results panel. Results update as you change the inputs.
Choose a preset to load an example, then adjust the values for your situation.
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