Chemistry Calculators
Make up a solution of the right molarity, dilute a stock with C₁V₁ = C₂V₂, solve the ideal gas law and work out pH — with exact SI constants and the steps shown.
40 calculators · A–Z of all calculators
- Molarity CalculatorMolarity of a solution, or grams to weigh out.
- Percent to Molarity CalculatorMass percent and density to M.
- Molality CalculatorMoles of solute per kilogram of solvent.
- Dilution CalculatorC1V1 = C2V2 — stock and water to use.
- PPM CalculatorParts per million, ppb and percent.
- Ideal Gas Law CalculatorSolve PV = nRT for any one variable.
- Combined Gas Law CalculatorSolve P1V1/T1 = P2V2/T2.
- Partial Pressure CalculatorDalton’s law for gas mixtures.
- Graham’s Law CalculatorRelative rates of effusion.
- Freezing Point Depression CalculatorFreezing and boiling points of solutions.
- Osmotic Pressure CalculatorΠ = iMRT in atm and mm Hg.
- Activation Energy CalculatorArrhenius equation from two rate constants.
- Gibbs Free Energy CalculatorΔG = ΔH − TΔS and spontaneity.
- Nernst Equation CalculatorCell potential from E° and Q.
- Beer–Lambert Law CalculatorAbsorbance and concentration.
- pH CalculatorpH and pOH from ion concentration, and back.
- Buffer pH CalculatorHenderson–Hasselbalch buffer pH.
- Titration CalculatorUnknown concentration from a titration.
- Molar Mass CalculatorMolar mass and percent composition of a formula.
- Grams to Moles CalculatorGrams to moles and back, with molecules.
- Percent Yield CalculatorPercent yield of a reaction.
- Carbon Dating CalculatorRadiocarbon age from carbon-14.
- Chemical Equation BalancerBalance any reaction with whole numbers.
- Empirical Formula CalculatorFormula from percent composition.
- Limiting Reactant CalculatorLimiting reactant, theoretical yield and excess.
- Rydberg Equation CalculatorHydrogen spectral lines: wavelength and photon energy.
- Clausius-Clapeyron CalculatorVapor pressure, boiling point or ΔHvap from two points.
- Serial Dilution CalculatorTransfer and diluent volumes and each tube’s concentration.
- Integrated Rate Law CalculatorZero, first and second order: [A], time, half-life, k.
- Electron Configuration CalculatorFull and noble-gas configuration of any element.
- Stoichiometry CalculatorMoles, grams and gas volume of every substance in a reaction.
- Average Atomic Mass CalculatorWeighted mass from isotopes, or abundances from the average.
- Equilibrium Constant CalculatorK or Q with the shift direction, Kc to Kp, combined reactions, K and ΔG°.
- Enthalpy of Reaction CalculatorΔH° from enthalpies of formation, heat for your amount, and Hess’s law.
- ICE Table CalculatorEquilibrium amounts from K and starting amounts, K from data, and weak acid or base pH.
- Ksp and Solubility CalculatorKsp from solubility, solubility from Ksp, common ion effect and precipitation test, with a Ksp table.
- Doubling Time CalculatorBacterial doubling time, generations and growth rate from two cell counts.
- DNA Melting Temperature CalculatorOligo Tm by the Wallace rule or basic formula, GC content and molecular weight.
- Michaelis-Menten CalculatorEnzyme rate, substrate needed, and Vmax and Km fitted from your data.
- Cell Count CalculatorHemocytometer counts to cells per mL, trypan blue viability and seeding volume.