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Grams to Moles Calculator
Convert grams to moles using the molar mass.
From mass to moles
To do stoichiometry you convert the grams you weighed into moles, the currency of chemical reactions. This tool divides the mass by the molar mass.
Thirty-six grams of water, at about 18 grams per mole, is 2 moles. Enter the mass and molar mass of your substance to find the moles.
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The calculation runs in your browser, so nothing you enter is uploaded.
Frequently Asked Questions
How does it convert?
Moles equal the mass in grams divided by the molar mass in grams per mole.
Where do I find molar mass?
Sum the atomic masses in the chemical formula from the periodic table.
What units?
Grams and grams per mole give a result in moles.
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