Henderson Hasselbalch Calculator
Calculate buffer pH from pKa and base-to-acid ratio.
Henderson Hasselbalch measurements
Enter your values, then calculate.
Result
How to calculate henderson hasselbalch
The Henderson-Hasselbalch equation calculates the pH of a buffer solution from the pKa of the weak acid and the ratio of conjugate base to acid concentrations.
How the calculation works
pH = pKa + log10(Base concentration ÷ Acid concentration).
Example
pKa of 4.75, base concentration 0.3M, acid concentration 0.1M: 4.75 + log10(0.3÷0.1) = 4.75 + log10(3) ≈ 4.75+0.48 = 5.23.
Frequently asked questions
How is Result calculated?
Result = [pKa] + log10([Conjugate base concentration] ÷ [Weak acid concentration]).
Is the Henderson Hasselbalch Calculator free to use?
Yes — every calculator on Simple Calculator Tools is free, runs in your browser, and does not require an account.
Henderson Hasselbalch Calculator
pH = pKa + log10(Base concentration ÷ Acid concentration).
Let's understand your henderson hasselbalch result.
Calculate a result above and this guide will help you interpret it using this calculator's own formula and explanation.
Pro Tips for Henderson Hasselbalch
- This equation applies specifically to buffer solutions containing a weak acid and its conjugate base in comparable concentrations.
- When base and acid concentrations are equal, pH equals pKa exactly, since log10(1) = 0.
Common Henderson Hasselbalch Mistakes to Avoid
- Applying this equation to a solution that isn't actually a buffer (lacking significant amounts of both the weak acid and its conjugate base).
When to Use This Calculator
The Henderson-Hasselbalch equation calculates the pH of a buffer solution from the pKa of the weak acid and the ratio of conjugate base to acid concentrations.