Science & Engineering

Free Atomic Mass Calculator — calculate molar mass and molecular weight from any chemical formula. Supports parentheses, brackets, hydrates (CuSO4·5H2O), all 118 elements with IUPAC 2021 atomic weights, elemental composition table, donut chart, Hill formula, empirical formula, mole-mass converter, average atomic mass from isotopes, and proton/neutron mode.

Free Dilution Calculator using the C1V1=C2V2 formula. Solve for any variable — stock concentration, stock volume, final concentration, or final volume — with multi-unit support, ratio mode, and serial dilution steps.

Free grams to moles calculator — convert any mass in grams to moles (and moles to grams) using molar mass. Supports chemical formula parsing, elemental composition charts, and Avogadro's number output.

Free Mole Calculator — convert between mass, moles, and molar mass using n = m / M. Supports chemical formula parsing, Avogadro's number, gas volume at STP, and 14 mass units.

Free Molecular Weight (Molar Mass) calculator — enter any chemical formula (e.g. H2O, Al2(SO4)3, CuSO4·5H2O) to instantly compute the molecular weight in g/mol, elemental composition, Hill notation, monoisotopic mass, and moles-to-grams conversions. Supports all 118 elements, nested parentheses, hydrate dot notation, and functional group shorthands.

Free Moles to Grams Calculator — convert moles to grams or grams to moles using molar mass. Supports chemical formula parsing, multi-unit inputs, Avogadro's number, and elemental breakdown.

Free interactive Periodic Table of the Elements — explore all 118 elements with detailed properties, color-coded categories, search, filters, temperature-based state visualization, and a molar mass builder.