Chemistry Calculators & Solvers

Calculate elemental mass percentages and mass ratios for any chemical formula (e.g. H2SO4, C6H12O6).

Calculate percent atom economy for synthetic chemical reactions to evaluate green chemistry mass efficiency.

Convert between total particles (atoms, molecules, ions), moles (n), and Avogadro's constant (6.022 × 10²³).

Determine simplest whole-number empirical ratio and molecular formula from elemental mass percentages and molar mass.

Convert mass in grams to moles and total molecule count for any chemical compound using molar mass.

Universal mole calculator for mass (g), molar volume of gas at STP, concentration (M × V), and particle count.

Calculate exact molecular weight and formula mass in g/mol for complex chemical formulas and hydrates.

Calculate component mole fractions (χ) and mole percentages in binary and multi-component chemical mixtures.

Convert moles directly to total atom count, constituent element atoms, and molecules using chemical formulas.

Balance chemical reaction equations automatically using matrix linear algebra stoichiometric coefficients.

Calculate reactant stoichiometry, limiting reagent, theoretical product yield, and percentage yield.

Calculate gas pressure (P), volume (V), moles (n), or temperature (T) using the ideal gas equation (PV = nRT).

Calculate pressure and volume changes for isothermal gas compression or expansion (P1V1 = P2V2).

Calculate gas volume and temperature relationships at constant pressure (V1/T1 = V2/T2).

Calculate gas pressure and temperature changes at constant volume (P1/T1 = P2/T2).

Calculate combined pressure, volume, and temperature state transitions for fixed gas amounts.

Convert between pKa, Ka, pKb, and Kb values and evaluate acid-base dissociation constants and conjugate pair strength.

Calculate hydrogen ion concentration [H⁺], hydroxide concentration [OH⁻], pH, and pOH in aqueous solutions.

Calculate solution molality (m in mol/kg), solute mass, and solvent mass for temperature-independent concentration.

Calculate solution molar concentration (M in mol/L), solute mass, and solution volume for lab reagent preparation.

Calculate solution normality (N in eq/L), equivalent weight, and acid-base valence factor (n).

Convert concentration between parts-per-million (ppm, mg/L) and molarity (M, mol/L) using solute molar mass.

Calculate mixing ratios for two solutions of different concentrations to prepare a desired intermediate concentration.

Calculate buffer capacity (β in mol/L·pH) and Van Slyke buffer intensity for weak acid-base conjugate systems.

Convert and compute solution concentration in Molarity (M), Mass Percent (% w/w), Volume Percent (% v/v), and g/L.

Calculate dilution factor (DF), stock volume, final volume, and serial dilution fold ratios.

Calculate stock reagent volume V1 and solvent volume needed to dilute concentrated solutions (C1V1 = C2V2).

Convert liquid solution molar concentration between Molar (M), Millimolar (mM), Micromolar (µM), and g/L.

Calculate concentrate liquid and water amounts needed for spray bottles and buckets based on dilution ratios (1:4, 1:10).

Calculate mean ionic activity coefficients (γ) and ionic strength (I) using Extended Debye-Hückel limiting law.

Calculate reaction activation energy (Ea in kJ/mol), frequency factor (A), and temperature-dependent rate constants.

Calculate barometric pressure reduction and water boiling temperature changes at different elevation altitudes.

Calculate solution boiling point elevation (ΔTb), ebullioscopic constant (Kb), and van 't Hoff factor (i).

Calculate vapor pressure (P1, P2), boiling temperature, and enthalpy of vaporization (ΔHvap) using Clausius-Clapeyron equation.

Calculate freezing point depression (ΔTf), cryoscopic constant (Kf), and solute molar mass for colligative cooling.

Calculate reaction spontaneity, Gibbs free energy change (ΔG), enthalpy (ΔH), and entropy (ΔS).

Calculate chemical reaction rate constant (k), Arrhenius pre-exponential factor, and temperature dependence.

Calculate differential reaction rate, reaction orders (m, n), and reactant concentration changes over time.

Calculate galvanic/electrolytic cell potential (E°cell), reduction potentials, and spontaneous redox electron flow.

Calculate non-standard electrochemical cell voltage E, reaction quotient Q, and electron transfer n.

Calculate remaining isotope quantity (N), initial activity (N0), decay constant (λ), and half-life (t½).

Calculate radioisotope decay activity rate (A = λN) in Becquerels (Bq) and Curies (Ci).

Calculate radioactive isotope half-life (t½), elapsed time, remaining fraction, and decay rate.

Calculate protons, neutrons, electrons, atomic mass number, and net ionic charge from atomic symbols or atomic numbers.

Calculate molecular orbital bond order, bond stability, and magnetic properties from bonding and antibonding electrons.

Calculate effective nuclear charge (Zeff = Z - S) and electron shielding constants using Slater's Rules.

Determine full and noble gas shorthand electron configurations, valence electrons, and orbital energy levels for all 118 elements.

Calculate electronegativity difference (ΔEN), Pauling scale ratings, and bond classification (Covalent, Polar, Ionic).

Calculate percent ionic character of chemical bonds using Hannay-Smyth equation and dipole moment measurements.

Calculate percent atom economy for synthetic chemical reactions to evaluate green chemistry mass efficiency.