Grams to Moles Calculator

Convert a mass to moles using molar mass.

Moles (mol) 0.9992

Formula: moles = mass ÷ molar mass

Step-by-step with your numbers:

1. Values used:

2. Mass = 18

3. Molar mass = 18.015 g/mol

5. Moles = Mass / Molar mass = 18 / 18.015 = 0.9992mol

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Convert grams of a substance into moles.

The math behind it

moles = mass (g) ÷ molar mass (g/mol).

18 g water (18.015) → ~1 mol.

Need molar mass?

Get it from the Molar Mass calculator using the formula.