Chemistry Tools
Interactive calculators and explorers for the topics students find hardest: moles, equations, bonding, shapes, equilibrium and more.
Free sample
Periodic Table
Interactive periodic table with element cards and category key.
Everything else on this page opens with a subscription.
Free sample
All 22 in Tools
Periodic TableFreeInteractive periodic table with element cards and category key.
3D Molecule ViewerRotate and zoom real molecules in 3D.
Bond Type PredictorPredict ionic, polar or non-polar bonds from electronegativity.
Electron Configuration ToolWrite electron configurations and orbital diagrams for any element.
Empirical Formula FinderFrom percentage composition to empirical and molecular formula.
Energy Profile DrawerDraw exo- and endothermic energy profiles with activation energy.
Equation BalancerBalance chemical equations and check the atom count.
Hess's Law CalculatorCombine reactions and enthalpies with Hess's law.
Lab Equipment IdentifierQuiz yourself on lab equipment names and uses.
Lab Safety SymbolsLearn the lab safety symbols interactively.
Le Chatelier SimulatorChange concentration, pressure or temperature and watch the equilibrium shift.
Lewis Structure BuilderBuild Lewis structures with bonding and lone pairs.
Molar Mass CalculatorMolar mass of any formula, element by element.
Quantum NumbersThe four quantum numbers explained and checked.
Reactivity SeriesMetal reactivity series with displacement examples.
Sig Fig CheckerCount significant figures and round correctly.
Solubility Curve ReaderRead solubility curves and solve saturation questions.
Solubility TableSolubility rules table for common ions.
Stoichiometry CalculatorMole ratios, masses and limiting reagent step by step.
Unit ConverterConvert chemistry units: mass, volume, pressure, temperature, moles.
VSEPR Shape ExplorerMolecular shapes and bond angles from VSEPR theory.
pH Scale ExplorerExplore acids, bases and everyday substances on the pH scale.