Tool registry

Searchable chemistry calculators

Every tool below is backed by a typed calculation module with visible formulas, assumptions, and warnings.

Free

Molar Mass Calculator

Parse a chemical formula and calculate molar mass with percent composition.

General ChemistryOpen
Free

Molarity Calculator

Solve M = n / V for concentration, moles, or solution volume.

SolutionsOpen
Free

Dilution Calculator

Solve C1V1 = C2V2 and estimate solvent volume added.

SolutionsOpen
Free

Solution Preparation Calculator

Estimate reagent mass or stock aliquot for preparing a target solution.

Laboratory MathOpen
Free

Stoichiometry Calculator

Use a balanced equation to convert between reactant and product amounts.

StoichiometryOpen
Free

Limiting Reagent Calculator

Identify the limiting reactant and estimate theoretical product from multiple reactants.

StoichiometryOpen
Free

Percent Yield Calculator

Solve for percent yield, actual yield, or theoretical yield.

StoichiometryOpen
Free

Empirical And Molecular Formula Calculator

Convert elemental composition to empirical and molecular formulas.

General ChemistryOpen
Free

Ideal Gas Law Calculator

Solve PV = nRT for pressure, volume, moles, or absolute temperature.

Physical ChemistryOpen
Free

Combined Gas Law Calculator

Solve one missing state variable using P1V1/T1 = P2V2/T2.

Physical ChemistryOpen
Free

pH And pOH Calculator

Convert among pH, pOH, hydrogen ion concentration, and hydroxide concentration.

Acids and BasesOpen
Free

Henderson-Hasselbalch Calculator

Solve buffer pH, pKa, acid concentration, base concentration, or ratio.

Acids and BasesOpen
Free

Buffer Preparation Calculator

Estimate acid/base moles and optional masses for an ideal buffer target.

Acids and BasesOpen
Free

Beer-Lambert Law Calculator

Solve A = epsilon b c with concentration, path length, and transmittance support.

Analytical ChemistryOpen
Free

Nernst Equation Calculator

Calculate nonstandard cell potential from E0, temperature, electron count, and Q.

ElectrochemistryOpen
Free

Gibbs Free Energy Calculator

Solve common Delta G relationships without mixing incompatible modes.

ThermodynamicsOpen
Free

First-Order Half-Life Calculator

Solve first-order rate constant, half-life, remaining amount, or elapsed time.

KineticsOpen
Free

Calorimetry Calculator

Solve heat, mass, specific heat, temperature change, or final temperature.

ThermodynamicsOpen
Free

Density Calculator

Solve density, mass, or volume with common scientific units.

Laboratory MathOpen
Free

Laboratory Percentage Calculators

Calculate common lab percentages, ppm, ppb, recovery, error, and RSD.

Laboratory MathOpen
Free

DBE / IHD Calculator

Calculate double-bond equivalents from a molecular formula.

Organic ChemistryOpen
Free

IR Peak Interpreter

Map observed IR peaks to likely functional-group assignments without claiming certainty.

Organic ChemistryOpen