Chemistry Calculators
Acid-Base Titration Calculator
Solve CaVa = CbVb for acid-base titrations to find an unknown concentration or volume at the equivalence point between an acid and a base solution.
Buffer pH Calculator
Calculate the pH of an acid-base buffer from pKa and the concentrations of the weak acid and its conjugate base using the Henderson-Hasselbalch equation.
Chemical Equation Balancer
Balance a chemical equation by solving the atom-conservation system with exact fractions, returning the smallest whole-number coefficients possible.
Concentration Calculator
Find solution concentration in mol/L from moles of solute and volume of solution, the core molarity relationship behind every solution prep calculation.
Dilution Calculator
Solve the C1V1 = C2V2 dilution equation for any missing variable when scaling a concentrated stock solution down to a target working concentration.
Dilution Ratio Calculator
Calculate the exact stock and diluent volumes needed to prepare a target total volume from a stock:diluent ratio like 1:4 or 1 plus 9.
Empirical Formula Calculator
Derive a compound's empirical formula from elemental mass percentages by converting each to moles and reducing to the simplest whole-number ratio.
Equivalent Weight Calculator
Calculate equivalent weight by dividing molar mass by the n-factor, the mass that delivers exactly one mole of usable reactive capacity.
Gas Law Calculator
Solve the ideal gas law PV = nRT for pressure, volume, moles, or temperature, with automatic Celsius-to-kelvin temperature conversion built in.
Half-Life Calculator
Calculate remaining quantity after radioactive decay, or solve for the half-life itself given starting and ending amounts and the elapsed time.
Henderson-Hasselbalch Calculator
Calculate solution pH from a weak acid's pKa and the ratio of conjugate base to acid concentration using the Henderson-Hasselbalch equation.
Ionic Strength Calculator
Calculate a solution's ionic strength from the concentration and charge of each dissolved ion, required for activity coefficient corrections.
Limiting Reactant Calculator
Identify which reactant limits a reaction's yield by comparing moles divided by stoichiometric coefficient for each reactant in the equation.
Mass Percent Calculator
Calculate the mass percent of a component within a mixture or solution from its mass and the total mass, the way most product labels report concentration.
Molality Calculator
Calculate molality from moles of solute and kilograms of solvent, the temperature-independent concentration unit used in colligative property work.
Molar Mass Calculator
Calculate the molar mass of any chemical formula, including nested parentheses like Ca(OH)2, by summing standard atomic weights element by element.
Molarity Calculator
Solve for molarity, moles, or volume in the molarity relationship, the concentration unit stoichiometry and solution prep calculations are built around.
Molecular Formula Calculator
Scale an empirical formula up to the true molecular formula using the compound's actual molar mass and a computed whole-number multiplier.
Molecular Weight Calculator
Calculate a compound's molecular weight by summing the atomic weight contribution of every atom in its chemical formula, including grouped subscripts.
Moles Calculator
Convert a measured mass into moles using a known molar mass, or enter a chemical formula directly and let the calculator determine molar mass for you.
Normality Calculator
Calculate normality from molarity and the n-factor, accounting for how many reactive equivalents each mole of a compound actually provides.
Osmolarity Calculator
Calculate osmolarity from molar concentration and the van't Hoff dissociation factor, accounting for how many particles each solute produces.
pH Calculator
Convert between pH and hydrogen ion concentration in either direction using pH = -log10[H+], with a reference table of common acids and bases included.
Reaction Yield Calculator
Calculate percent yield from actual and theoretical yield to evaluate how efficiently a chemical reaction converted reactants into isolated product.
Redox Calculator
Calculate standard cell potential from cathode and anode reduction potentials, and determine whether a redox reaction is spontaneous under standard conditions.
Stoichiometry Calculator
Calculate the mass of product formed from a reactant's mass or moles, using the balanced equation's stoichiometric coefficients and molar masses.
Volume of Gas Calculator
Calculate the volume a gas occupies from its moles, temperature, and pressure, using the ideal gas law rearranged to solve for volume directly.
Chemistry Runs on Exact Ratios
From balancing an equation to preparing a precise solution, chemistry rewards exact quantitative work more than almost any other science — a small rounding error in molarity or stoichiometry changes a real experimental outcome. These twenty-six calculators cover the core quantitative chemistry used from the classroom to the lab bench.
pH is logarithmic — each single unit represents a tenfold change in acidity, so a solution of pH 4 is not slightly more acidic than pH 7, it is a thousand times more acidic. Test your own solution with the pH Calculator.
Try It Yourself: A Dilution Problem
Say you have a 5M stock solution and need 200mL of a 0.5M working solution. Using C₁V₁=C₂V₂: (5)(V₁)=(0.5)(200), so V₁=20mL of stock, topped up with 180mL of diluent to reach 200mL total. The Dilution Calculator handles this instantly for any starting values.
Popular Chemistry Calculators
- Molarity Calculator — converts moles of solute and solution volume into concentration.
- Stoichiometry Calculator — converts between reactant and product quantities using balanced equation ratios.
- Limiting Reactant Calculator — identifies which reactant runs out first and caps the reaction's yield.
Molarity vs molality: molarity measures moles of solute per liter of solution (volume-based), while molality measures moles per kilogram of solvent (mass-based) — molality is preferred when temperature will change, since it does not shift with volume expansion.
Related: Biology Calculators, Physics Calculators.