Free online chemistry calculators for students, teachers, and professionals. Calculate molarity, pH, gas laws, stoichiometry, equilibrium constants, and more with step-by-step solutions.
Calculate molar concentration from mass, molecular weight, and volume
SolutionsCalculate molal concentration from mass and solvent mass
SolutionsCalculate pH, pOH, H+ and OH- concentrations
Acids & BasesIdeal, Boyle's, Charles's, Gay-Lussac's, and Combined Gas Laws
GasesLimiting reactants, theoretical yields, mole ratios
ReactionsCalculate Kc and Kp for chemical reactions
EquilibriumCalculate boiling point elevation using colligative properties
Colligative PropertiesCalculate freezing point depression using colligative properties
Colligative PropertiesCalculate osmotic pressure using Van't Hoff equation
Colligative PropertiesCalculate rate constant using Arrhenius equation
KineticsCalculate buffer pH using Henderson-Hasselbalch equation
Acids & BasesAcid-base titrations, equivalence points, pH curves
Acids & BasesCalculate Ksp and molar solubility of ionic compounds
EquilibriumCalculate all four colligative properties
Colligative PropertiesChemical kinetics, half-life, reaction orders
KineticsOxidation numbers, cell potentials, redox reactions
ElectrochemistryHeat of reaction, enthalpy changes, energy transfers
ThermodynamicsRadioactive decay, half-life, decay constant
Nuclear ChemistryOur comprehensive collection of 20 chemistry calculators covers all major topics in chemistry, from basic solutions and concentrations to advanced topics like nuclear chemistry and thermochemistry.