Periodic Table (PDF) | Useful Data | Useful Formulas 

Molar Mass Calculator

A version for mobile devices is also available.

Enter the formula and press "calculate" to work out the molecular mass, the number of moles in 1 g and the percentage by mass of each element.

Chemical symbols are case specific and should be entered correctly to prevent ambiguity - for example, Fe will work correctly but FE and fe will not.

You can use up to 12 different elements and brackets () and [] in your formula.