Cubestack

Molar Mass Calculator

Free molar mass calculator — enter any chemical formula (brackets and hydrates included) to get its molar mass in g/mol, the mass percent of each element and grams-to-moles conversion.

Element symbols are case-sensitive: Co is cobalt, CO is carbon monoxide. Use ( ) or [ ] for groups and · or * for water of crystallisation.

Molar mass of C6H12O6 (C6H12O6)

180.156 g/mol

ElementAtomsAtomic massTotalMass %
H Hydrogen121.00812.096
6.71%
C Carbon612.01172.066
40.00%
O Oxygen615.99995.994
53.28%

Grams ↔ moles

Moles
0.055507 mol
Molecules
3.3427e+22
10 mol weighs
1801.56 g

What is the Molar Mass Calculator?

Molar mass is the mass of one mole of a substance, in grams per mole. It's the sum of the atomic masses of every atom in the formula — water (H₂O) is 2 × 1.008 + 15.999 = 18.015 g/mol.

How to use it

  1. 1

    Type the formula

    Element symbols are case-sensitive.

  2. 2

    Read the molar mass

    And the composition table.

  3. 3

    Convert

    Enter grams to get moles.

Features

  • Any formula

    Brackets, square brackets and hydrates like CuSO4·5H2O.

  • Element breakdown

    Atom counts, mass and mass percent.

  • Grams ↔ moles

    Plus number of molecules.

  • IUPAC masses

    Standard atomic weights for all 103 elements.

Popular uses

  • Chemistry homework

    Stoichiometry and mole calculations.

  • Lab prep

    Weigh out the right amount of a reagent.

  • Composition

    Percent by mass of each element.

Frequently asked questions

Molar mass vs molecular weight?

Numerically the same: g/mol vs atomic mass units (u).

Why does case matter?

Co is cobalt, but CO is carbon and oxygen.

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