GlenCalc

Molecular weight calculator

Type a formula with element symbols as written, for example H2O, Ca(OH)2 or CuSO4·5H2O (a dot or * for hydrates).

Your answer

Molar mass180.156 g/mol
Composition
ElementAtomsMass (g/mol)Mass %
C672.06640%
H1212.0966.71%
O695.99453.28%

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How we worked it out

Updated as you change the numbers.

  1. 6 × C (12.011) + 12 × H (1.008) + 6 × O (15.999).

Method and assumptions

Molar mass is the sum of the standard atomic weights of every atom in the formula. Atomic weights are IUPAC standard values to five significant figures; for radioactive elements without a standard weight, the mass number of the most stable isotope is used.

Questions

What is the molar mass of glucose, C6H12O6?

180.156 g/mol.

Sources

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