How to Use this Calculator

Select the concentration of the acid ([HA]), the conjugate base ([A⁻]), and the pH of the solution from the dropdown menus. Then click on the "Calculate pKa" button. The calculator will use the Henderson-Hasselbalch equation to calculate the pKa value.

Use For

This tool helps chemistry students and researchers calculate the acid dissociation constant (pKa), especially when working with buffer solutions. It’s widely used in chemistry labs, pharmaceutical studies, and biochemical reactions.