Tool registry
Searchable chemistry calculators
Every tool below is backed by a typed calculation module with visible formulas, assumptions, and warnings.
Molar Mass Calculator
Parse a chemical formula and calculate molar mass with percent composition.
Molarity Calculator
Solve M = n / V for concentration, moles, or solution volume.
Dilution Calculator
Solve C1V1 = C2V2 and estimate solvent volume added.
Solution Preparation Calculator
Estimate reagent mass or stock aliquot for preparing a target solution.
Stoichiometry Calculator
Use a balanced equation to convert between reactant and product amounts.
Limiting Reagent Calculator
Identify the limiting reactant and estimate theoretical product from multiple reactants.
Percent Yield Calculator
Solve for percent yield, actual yield, or theoretical yield.
Empirical And Molecular Formula Calculator
Convert elemental composition to empirical and molecular formulas.
Ideal Gas Law Calculator
Solve PV = nRT for pressure, volume, moles, or absolute temperature.
Combined Gas Law Calculator
Solve one missing state variable using P1V1/T1 = P2V2/T2.
pH And pOH Calculator
Convert among pH, pOH, hydrogen ion concentration, and hydroxide concentration.
Henderson-Hasselbalch Calculator
Solve buffer pH, pKa, acid concentration, base concentration, or ratio.
Buffer Preparation Calculator
Estimate acid/base moles and optional masses for an ideal buffer target.
Beer-Lambert Law Calculator
Solve A = epsilon b c with concentration, path length, and transmittance support.
Nernst Equation Calculator
Calculate nonstandard cell potential from E0, temperature, electron count, and Q.
Gibbs Free Energy Calculator
Solve common Delta G relationships without mixing incompatible modes.
First-Order Half-Life Calculator
Solve first-order rate constant, half-life, remaining amount, or elapsed time.
Calorimetry Calculator
Solve heat, mass, specific heat, temperature change, or final temperature.
Density Calculator
Solve density, mass, or volume with common scientific units.
Laboratory Percentage Calculators
Calculate common lab percentages, ppm, ppb, recovery, error, and RSD.
DBE / IHD Calculator
Calculate double-bond equivalents from a molecular formula.
IR Peak Interpreter
Map observed IR peaks to likely functional-group assignments without claiming certainty.