Science & Environment
Henderson-Hasselbalch Buffer Calculator
Calculate buffer pH and relative buffering capacity using the Henderson-Hasselbalch equation.
Your inputs
Change any value to update the result instantly.
Buffer pH
4.76
Base/acid ratio
1
Relative buffer capacity
0.1152
pKa used
4.76
Formula and working
pH = pKa + log([A-] ÷ [HA])
- 1
Collect the inputs
pKa of weak acid = 4.76; Conjugate base concentration = 0.1 M; Weak acid concentration = 0.1 M
- 2
Apply the formula
pH = pKa + log([A-] ÷ [HA])
- 3
Result
Buffer pH = 4.76
Frequently asked questions
Important limitation
This is an educational estimate based only on the values and formula shown. Verify current rates, rules, units, and professional standards before relying on the result. It is not personalized financial or investment advice.
Report a mistake or request an improvement
Tell us if a formula, unit, explanation, or result needs attention. Your message will include this calculator’s name and page.
Related calculators
Arrhenius Equation Activation Energy Calculator
Calculate the rate constant or activation energy of a reaction using the Arrhenius equation.
Empirical & Molecular Formula Calculator
Determine the empirical and molecular formula ratio of a two-element compound from percent mass.
Faraday's Laws of Electrolysis Calculator
Calculate the mass of metal deposited or dissolved during electrolysis using Faraday's laws.
Gibbs Free Energy Spontaneity Calculator
Calculate Gibbs free energy change (dG = dH - TdS) to determine whether a reaction is spontaneous.
Hess's Law Enthalpy of Reaction Calculator
Calculate the enthalpy of reaction using Hess's law from the standard enthalpies of formation of products and reactants.
Molar Mass & Molecular Weight Calculator
Find the molar mass, moles per gram, and estimated atom/molecule count for common compounds.