Calculer the molecular weight (molar mass) of any chemical formula instantly. Supports parentheses, hydrates, and displays element composition breakdown. Pure côté client, no server needed.
Ceci molecular weight calculator computes the molar mass of any chemical formula instantly in your browser. It supports standard chemical notation including parentheses for complex compounds and the dot notation for hydrates (e.g., CuSO₄·5H₂O). The calculator uses standard atomic weights from the IUPAC and displays a detailed breakdown of each element's contribution to the total mass. Tout calculations happen côté client — no data is sent to any server.
Molecular weight (also called molar mass or molecular mass) is the sum of the atomic weights of all atoms in a molecule. It is expressed in grams per mole (g/mol) and is essential for stoichiometric calculations in chemistry.
Simply type the formula as you would write it. For example, calcium nitrate is Ca(NO3)2, and aluminum sulfate is Al2(SO4)3. The calculator automatically handles the multiplication of atoms inside parentheses.
Oui! Use the dot notation for water molecules in hydrates. For example, copper(II) sulfate pentahydrate is CuSO4.5H2O or CuSO4·5H2O. The calculator will include the mass of water molecules in the total.
Ceci calculator uses standard atomic weights from the IUPAC (International Union of Pure and Applied Chemistry) for the most common isotopes. The values are rounded to 4 decimal places for precision.
Oui, completely free. Non ads, no registration, no limits. Tout calculations happen in your browser with no data sent to any server.