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Chemical Formula Molar Mass Calculator

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Parse element symbols, positive integer counts and nested parentheses for 35 supported elements: H He Li Be B C N O F Ne Na Mg Al Si P S Cl Ar K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ag I Au Hg Pb..

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Next steps

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Molar Concentration Calculator Convert a solute mass and molar mass into molarity at an entered final solution volume.
Solution Mass Percent Calculator Calculate solute mass as a percentage of total solution mass.
Two-Solution Concentration Mixing Calculator Find ideal concentration after combining two solutions on the same volume-based scale.

On this page How it works & practical examples

How to use the Chemical Formula Molar Mass Calculator

Parse element symbols, positive integer counts and nested parentheses for 35 supported elements: H He Li Be B C N O F Ne Na Mg Al Si P S Cl Ar K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ag I Au Hg Pb.

The calculation

Molar mass = Σ(atom count × stored abridged standard atomic weight)

Worked example

Ca(OH)2 contains one calcium, two oxygen and two hydrogen atoms and has molar mass 74.092 g/mol using the stated table.

Assumptions and limits

Stored CIAAW 2024 abridged values, not isotope-specific masses. Unsupported elements, charge suffixes, hydrate dot notation and malformed groups are rejected rather than silently approximated.

Common questions

Which inputs should I use?