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Molecular Weight Calculator

Quickly calculate molecular weight of chemical formulas, supporting complex organic and inorganic compounds

Enter a chemical formula or SMILES notation. Examples:
  • H2O (water)
  • NaCl (table salt)
  • CH3COOH (acetic acid)
  • C6H12O6 (glucose)
  • NH3 (ammonia)
  • O=O (oxygen, SMILES)
  • CC(=O)O (acetic acid, SMILES)