Calculate the molecular weight (molar mass) of any chemical compound or formula.
Enter the chemical formula using proper notation (e.g., H2O, C6H12O6). Note: Element symbols must use proper capitalization (H, not h; Na, not NA or na).
Water (H2O)
Molecular Weight: 18.015 g/mol
Glucose (C6H12O6)
Molecular Weight: 180.156 g/mol
Sodium Chloride (NaCl)
Molecular Weight: 58.443 g/mol
Calcium Hydroxide (Ca(OH)2)
Molecular Weight: 74.093 g/mol
Molecular weight, also known as molecular mass or molar mass, is the mass of a molecule. It is calculated as the sum of the atomic weights of each constituent element multiplied by the number of atoms of that element in the molecular formula.
The molecular weight is expressed in atomic mass units (amu) or grams per mole (g/mol). One mole of a substance contains Avogadro's number (6.022 × 1023) of molecules.
This calculator uses the most recent atomic weight values from the International Union of Pure and Applied Chemistry (IUPAC).
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