Molar Mass Calculator

A molar mass calculator that reads a chemical formula and adds up the standard atomic weights of every atom in it. Type something like CuSO4.5H2O or K4[Fe(CN)6] and it returns the molar mass in grams per mole, the mass each element contributes and its share by weight, plus grams to moles either way. The periodic table is built in and covers all 118 elements. That is the piece the molarity calculator asks you to supply, since it takes molar mass as an input and carries no table of its own.

Calculator Type

Type the formula and get the molar mass with the contribution of each element.

Symbols are case sensitive. Brackets nest, and a dot or a star marks a hydrate: Ca(OH)2, K4[Fe(CN)6], CuSO4.5H2O.
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The same table used to turn a weighed mass into moles, or moles into a mass to weigh out.

Symbols are case sensitive. Brackets nest, and a dot or a star marks a hydrate: Ca(OH)2, K4[Fe(CN)6], CuSO4.5H2O.
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One element from the table, with the checks that are run against the table itself.

A symbol such as Fe, or a name such as iron.
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