Structure & Composition Tools
Turn a chemical formula or SMILES string into composition, molar mass and elemental data.
Anything that starts from a formula ends up needing the same three answers: which elements it contains, what a mole of it weighs, and where those elements sit in the periodic table. These tools answer that for formula strings, SMILES input and elemental composition data, plus density calculations that tie mass to volume.
Molar Mass Calculator
Calculate the molar mass of a compound from its chemical formula (e.g. H2O, NaCl).
Open tool →Interactive Periodic Table
Browse all 118 elements. Click for atomic weight, electron shells, density, melting & boiling point, and electronegativity. Temperature slider & property heatmap.
Open tool →Formula Parser
Parse a chemical formula and view element composition, atom counts, and mass contributions.
Open tool →Density Calculator
Calculate density (ρ = m/V), mass, or volume from the other two values. Supports any combination of known and unknown variables.
Open tool →SMILES to Molecular Weight
Enter a SMILES string to get the molecular formula and molar mass, with implicit hydrogen handling.
Open tool →