Chemistry Calculators
50 free chemistry calculators for molarity, pH, stoichiometry, gas laws, thermodynamics, and electrochemistry. No signup required.
50 free tools
Activation Energy Calculator
Free activation energy calculator. Enter k1, k2, T1, T2 to find Ea using ln(k2/k1) = (Ea/R)(1/T1 - 1/T2).
Arrhenius Equation Calculator
Free Arrhenius equation calculator. Enter pre-exponential factor A, activation energy Ea, and temperature T to find the rate constant k.
Atom Economy Calculator
Free atom economy calculator. Enter molar masses of desired and all products to evaluate reaction efficiency.
Avogadro's Number Calculator
Free Avogadro's number calculator. Enter moles to find the number of particles, or enter particles to find moles.
Binding Energy Calculator
Free binding energy calculator. Enter mass defect in amu to find nuclear binding energy in MeV. Also calculates binding energy per nucleon.
Boiling Point Elevation Calculator
Free boiling point elevation calculator. Enter Kb, molality, and van't Hoff factor to find the change in boiling point.
Buffer pH Calculator
Free buffer pH calculator. Enter weak acid and conjugate base concentrations with pKa to find buffer pH and capacity.
Cell Potential Calculator
Free cell potential calculator. Enter the standard reduction potentials of cathode and anode to find the cell EMF.
Compressibility Factor Calculator
Free compressibility factor calculator. Enter P, V, n, and T to find Z and assess deviation from ideal gas behavior.
Concentration Calculator
Free concentration unit converter. Convert between molarity (M), molality (m), mass percent, and mole fraction. Enter known values to convert.
De Broglie Wavelength Calculator
Free de Broglie wavelength calculator. Enter mass and velocity of a particle to find its quantum wavelength.
Diffusion Rate Calculator
Free Graham's law calculator. Enter molar masses of two gases to compare their diffusion or effusion rates.
Dilution Calculator
Dilution calculator using C1V1=C2V2. Enter any 3 values to solve for the 4th. Free online chemistry dilution tool.
Effusion Rate Calculator
Free effusion rate calculator using Graham's law. Enter molar masses to compare how fast two gases escape through a tiny hole.
Electrolysis Time Calculator
Free electrolysis time calculator. Enter desired mass, current, molar mass, and electrons to find the time needed.
Empirical Formula Calculator
Free empirical formula calculator. Enter element percentages to determine the simplest whole-number ratio of atoms.
Enthalpy Calculator
Free enthalpy calculator using bond energies. Enter total bond energies broken and formed to find the reaction enthalpy change.
Chemical Equation Balancer
Free chemical equation balancer. Enter reactants and products to get balanced coefficients for common chemical reactions.
Equilibrium Constant Calculator
Free equilibrium constant calculator. Enter product and reactant concentrations with their exponents to find Kc.
Faraday's Law of Electrolysis Calculator
Free Faraday's law calculator. Enter current, time, molar mass, and electrons to find mass deposited during electrolysis.
Freezing Point Depression Calculator
Free freezing point depression calculator. Enter Kf, molality, and van't Hoff factor to find the change in freezing point.
Gibbs Free Energy Calculator
Free Gibbs free energy calculator for chemistry. Enter enthalpy change, temperature, and entropy change to find delta G and spontaneity.
Grams to Moles Calculator
Free grams to moles converter. Enter mass in grams and molar mass to find moles, or vice versa. Essential chemistry conversion.
Henderson-Hasselbalch Calculator
Free Henderson-Hasselbalch calculator. Enter pKa, conjugate base concentration, and weak acid concentration to find buffer pH.
Henry's Law Calculator
Free Henry's law calculator. Enter Henry's law constant and partial pressure to find the dissolved gas concentration.
Ideal Gas Density Calculator
Free ideal gas density calculator. Enter pressure, molar mass, and temperature to find the density of an ideal gas.
Limiting Reagent Calculator
Free limiting reagent calculator. Enter masses and molar masses of two reactants with their stoichiometric ratio to find the limiting reagent.
Mass Defect Calculator
Free mass defect calculator. Enter atomic number, neutron count, and atomic mass to find the nuclear mass defect.
Mass Percent Calculator
Free mass percent calculator. Enter mass of solute and total solution mass to find mass percent concentration.
Molality Calculator
Free molality calculator. Enter moles of solute and kg of solvent to find molality. Useful for colligative property calculations.
Molar Mass Calculator
Free molar mass calculator. Type any chemical formula (like H2O, NaCl, C6H12O6) to get the molecular weight in g/mol.
Molarity Calculator
Calculate molarity (M = mol/L) instantly. Enter moles of solute and volume of solution. Free online molarity calculator for chemistry students.
Mole Fraction Calculator
Free mole fraction calculator. Enter moles of each component to find mole fractions. Supports 2 to 5 components.
Nernst Equation Calculator
Free Nernst equation calculator. Enter standard cell potential, electrons transferred, reaction quotient, and temperature to find actual cell potentia
Normality Calculator
Free normality calculator. Enter molarity and n-factor to find normality. N = M x n-factor. Useful for acid-base and redox chemistry.
Osmotic Pressure Calculator
Free osmotic pressure calculator. Enter molarity and temperature to calculate osmotic pressure using pi = MRT. R = 0.08206 L atm/(mol K).
Percent Composition Calculator
Free percent composition calculator. Enter a chemical formula to see the mass percent of every element.
Percent Yield Calculator
Free percent yield calculator. Enter actual yield and theoretical yield to find the percent yield of a chemical reaction.
pH Calculator
Free pH calculator. Enter hydrogen ion concentration to find pH, or enter pH to find [H+]. Shows pOH, [OH-], and acid/base classification.
Photon Energy Calculator
Free photon energy calculator. Enter frequency or wavelength to find the energy of a photon using E = hf or E = hc/lambda.
Radioactive Decay Calculator
Free radioactive decay calculator. Enter initial quantity, half-life, and elapsed time to find remaining quantity.
Raoult's Law Calculator
Free Raoult's law calculator. Enter mole fraction and pure component vapor pressure to find the partial vapor pressure.
Rate Constant Calculator
Free rate constant calculator. Enter rate and concentration data from two experiments to determine k and reaction order.
Reaction Quotient Calculator
Free reaction quotient calculator. Enter current concentrations and K to find Q and determine which direction the reaction will shift.
Rydberg Equation Calculator
Free Rydberg equation calculator. Enter initial and final energy levels to find the wavelength of hydrogen spectral lines.
Serial Dilution Calculator
Free serial dilution calculator. Enter initial concentration, dilution factor, and number of steps to find final concentration at each step.
Theoretical Yield Calculator
Free theoretical yield calculator. Enter reactant mass, molar masses, and mole ratio to find the maximum possible product.
Titration Calculator
Free titration calculator. Enter concentration and volume of the titrant and volume of the analyte to find the unknown concentration.
Van't Hoff Factor Calculator
Free van't Hoff factor calculator. Select compound type to find the expected number of particles per formula unit in solution.
Vapor Pressure Calculator
Free vapor pressure calculator using the Clausius-Clapeyron equation. Enter P1, T1, T2, and delta Hvap to find P2.
About Our Chemistry Calculators
Every chemistry calculator on this page is completely free, requires no signup, and runs entirely in your browser. We cover solutions and concentrations, stoichiometry, thermodynamics, electrochemistry, atomic and nuclear chemistry, and physical chemistry.
Whether you are a student, researcher, or lab professional, these tools provide instant calculations with formula references and step-by-step explanations.