Chemistry Calculators

Molarity, dilution, pH, and chemical reaction calculators.

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Showing 20 of 20 calculators

pH Calculator

Calculate pH, pOH, and hydrogen ion concentration from any given value using logarithmic acid-base formulas.

Molarity Calculator

Calculate molarity (molar concentration) from solute mass, molar mass, and solution volume with this free chemistry tool.

Dilution Calculator

Calculate dilution volumes and concentrations using the C1V1 = C2V2 equation for laboratory solution preparation.

Ideal Gas Law

Solve the ideal gas law equation PV = nRT for pressure, volume, temperature, or moles with unit conversions.

Mole Calculator

Convert between moles, grams, and number of particles using molar mass and Avogadro's number.

Molecular Weight

Calculate the molecular weight and elemental composition of any chemical compound from its formula.

Solution Concentration

Calculate solution concentration in mass percent, ppm, and molality from solute and solvent amounts.

Boiling Point Elevation

Calculate the boiling point elevation of a solution using the ebullioscopic constant, molality, and van't Hoff factor.

Freezing Point Depression

Calculate freezing point depression using the cryoscopic constant, molality, and van't Hoff factor.

Percent Composition

Calculate the percent composition by mass of each element in a chemical compound from atom counts.

Electrochemistry

Calculate standard cell potential, Nernst equation cell potential, and Gibbs free energy for electrochemical cells.

Stoichiometry

Calculate product mass from reactant mass using molar masses and stoichiometric mole ratios.

Half-Life Calculator

Calculate remaining substance, elapsed time, or half-life using the exponential radioactive decay formula.

Titration Calculator

Calculate unknown acid or base concentration and equivalence point volume using titration stoichiometry.

Osmotic Pressure

Calculate the osmotic pressure of a solution using molarity, temperature, and the van't Hoff factor.

Avogadro's Number

Convert between moles, number of particles, and mass using Avogadro's number (6.022 x 10²³).

Equation Balancer

Balance chemical equations by entering reactant and product coefficients and verify atom conservation.

Empirical Formula

Determine the empirical formula of a compound from elemental percent composition or mass data.

Oxidation Number

Calculate oxidation numbers for atoms in a compound using standard electronegativity rules.

Buffer Solution

Calculate the pH of a buffer solution using the Henderson-Hasselbalch equation with acid and conjugate base concentrations.