Chemistry
Molar mass, solution concentration, stoichiometry, pH, reaction yield, and thermodynamics for students and lab professionals.
Molar Mass Calculator
Look up or enter molar mass for common compounds and elements.
Molarity Calculator
Calculate molar concentration (mol/L) from mass, molar mass and volume.
Dilution Calculator
Find the final concentration or volume after diluting a stock solution (CโVโ = CโVโ).
pH Calculator
Calculate pH from Hโบ concentration, or convert between pH, pOH and Kw.
Stoichiometry & Reaction Yield
Calculate theoretical yield, actual yield and percent yield from a chemical reaction.
Empirical & Molecular Formula
Determine the empirical formula from percentage composition and find the molecular formula.
Ideal Gas Law Calculator
Solve PV = nRT for pressure, volume, moles or temperature of an ideal gas.
Reaction Enthalpy (Hess's Law)
Calculate standard enthalpy of reaction ฮHยฐrxn from bond enthalpies or heats of formation.
Buffer pH Calculator
Calculate pH of a buffer solution using the Henderson-Hasselbalch equation.
Acid-Base Titration Calculator
Find unknown acid/base concentration from titration data.
Electrochemical Cell Potential
Calculate standard cell potential Eยฐcell and Gibbs free energy ฮGยฐ from half-cell potentials.
Beer-Lambert Law (Absorbance)
Calculate absorbance, transmittance or concentration using the Beer-Lambert law.