Buffer pH Calculator
Henderson–Hasselbalch ratio and pH
Buffer pH Calculator
Henderson–Hasselbalch ratio and pH
Calculated locally in this browserColumn order: pKa, acid_concentration, base_concentration
Editable data table
| pKa | acid_concentration | base_concentration | |
|---|---|---|---|
Paste CSV / TSV
Analysis result
⚠ Henderson–Hasselbalch is an ideal approximation; temperature, ionic strength and activity coefficients can shift measured pH.
Data requirements
Enter pKa and positive acid and base concentrations.
pKa, acid_concentration, base_concentrationReview before reporting
Research use only. Validate raw data, exclusions and interpretation against the approved analysis plan.
Check raw observations, excluded rows, model assumptions and study-specific acceptance criteria before using the result.
Transparent analysis
Inputs are processed locally in your browser. Review the calculation policy, limitations and verification approach before reporting a result.
Read the methodology →