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FREETOOLS LABS

Substance & mole

Chemistry Calculator

Parse chemical formulas and calculate molar mass, amount, concentration, dilution, density and percentages.

Formula & molar mass

The local parser is case-sensitive and supports (), [], nesting, and hydrates with · or a period. Molar masses use CIAAW Abridged Standard Atomic Weights 2024. The Avogadro constant is exactly 6.02214076 × 10²³ mol⁻¹. Density and mass concentration are distinct quantities.

Result

Molar / formula mass

98.072 g/mol

H2 × 1.008 = 2.016 g/mol · 2.056 %
S1 × 32.06 = 32.06 g/mol · 32.69 %
O4 × 15.999 = 63.996 g/mol · 65.254 %

Chemistry Calculator

The local parser is case-sensitive and supports (), [], nesting, and hydrates with · or a period. Molar masses use CIAAW Abridged Standard Atomic Weights 2024. The Avogadro constant is exactly 6.02214076 × 10²³ mol⁻¹. Density and mass concentration are distinct quantities.

CIAAW 2024 · BIPM SI · NIST SP 811

FAQ

How is molar mass calculated?

Each element count is multiplied by its standard atomic weight and the contributions are summed.

Are Ca(OH)2 and hydrates supported?

Yes, including nested groups and CuSO4·5H2O.

Can it balance reactions?

No. Reaction stoichiometry is outside this version.