Does It Support Parentheses And Hydrates?

Yes. Nested groups, square brackets and coefficients after hydrate separators are supported.

Which Atomic Weights Are Used?

The calculation uses the same IUPAC-based atomic-weight dataset as BrowserTools's Interactive Periodic Table.

Molar Mass Calculator

Parse nested chemical formulas and hydrates into an auditable element-by-element molar-mass and composition ledger.

Composition Bench

Formula Input

Parse nested groups and hydrates, then audit every atomic-weight contribution.

Chemical Formula

Supports element symbols, numeric subscripts, parentheses, square brackets and hydrate separators such as CuSO4·5H2O. Atomic weights come from the site's IUPAC-based periodic-table dataset.

Molar Mass

74.09200 g/mol

Formula-Unit Atoms

Element	Count	Atomic Mass	Contribution	Mass %
CaCalcium	1	40.078	40.07800	54.09%
OOxygen	2	15.999	31.99800	43.19%
HHydrogen	2	1.008	2.01600	2.72%

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What Is the Molar Mass Calculator?

The Molar Mass Calculator parses element symbols, subscripts, nested parentheses or brackets and hydrate separators. It resolves every element against the site's IUPAC-based periodic-table data, then reports atomic counts, individual mass contributions and mass percentages.

How It Works

Enter a formula such as Ca(OH)2, Al2(SO4)3 or CuSO4·5H2O. Review the composition ledger, then copy or export the report as text, CSV or PDF.

When to Use It

Use it for solution preparation, formula checking, chemistry homework and composition analysis before moving into stoichiometric quantities.

Frequently Asked Questions

Does It Support Parentheses And Hydrates?: Yes. Nested groups, square brackets and coefficients after hydrate separators are supported.
Which Atomic Weights Are Used?: The calculation uses the same IUPAC-based atomic-weight dataset as BrowserTools's Interactive Periodic Table.

Found an issue? Send Feedback. See our data sources and update policy for tools that depend on changing information.