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Free Molar Mass
Calculator

Advanced free molar mass calculator with modern CIAAW atomic weights, nested formula parsing, hydrates, common compound names, Hill formula, composition, DBE, and amount conversions.

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About Free Molar Mass Calculator

Type a formula or a common compound name. The local chemistry engine understands nested groups, hydrates, charge notation and stoichiometric coefficients, then explains exactly how the molar mass is built.

Workspace options

  • Mass (g)
  • Amount (mol)

Available actions

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  • Analyze
  • water
  • caffeine
  • Ca(OH)₂
  • K₄[Fe(CN)₆]