Tools & web gadgets

Molecular Weight Calculator

Elements Common organic compounds
Common inorganic compounds



# Atom Molecular weight Subtotal weight Subtotal weight
(g/mol) (%) (g/mol)

Total molecular weight

You can use this online calculator for computing the molecular weight (MW) of molecules by entering their chemical formula (for example C3H4OH(COOH)3 ). Alternatively, you can choose a formula directly from one of the available option-lists, which contain a complete list of the elements, as well series of common organic and inorganic compounds.
The calculator handles at most two different bracket levels. Make sure you enter the molecule of crystallization at last (e.g. C2HCl3O.H2O ).