Grams to Moles Table: Moles by Mass of substance
Reference table of moles for Grams to Moles across a range of mass of substance values — exact, engine-computed figures you can read off at a glance.
Grams to Moles Calculator
Verified formula Updated Jun 2026 Private — runs on your device
Verified formula
Private
Moles
1.0000
For general information only — not financial, tax, legal or medical advice. Verify before you rely on it.
How to use the Grams to Moles Calculator
The Grams to Moles Calculator works out your moles in an instant. Enter mass of substance and molar mass and the result updates as you type — it is free, needs no sign-up, and runs entirely in your browser so your figures stay private.
- Enter the mass of substance.
- Enter the molar mass.
- Read off your moles — the calculator updates automatically, with no button to press.
Formula
The Grams to Moles Calculator uses the formula:
Moles = Mass of substance ÷ Molar Mass of substance
Worked example
For example, with mass of substance of 18 g and molar mass of 18 g/mol, the moles is 1.0000.
| Mass of substance | 18 g |
|---|---|
| Molar mass | 18 g/mol |
| Moles | 1.0000 |
|---|
Results are estimates for educational use, not professional advice.
Frequently asked questions
Divide the mass in grams by the molar mass in g/mol. 18 g of water (molar mass 18) is 1 mole.
It is the mass of one mole of a substance, found by adding the atomic masses in its formula. Water is about 18 g/mol.
A mole is 6.022 × 10²³ particles — atoms, molecules or ions — the chemist's standard counting unit.
Add the atomic masses from the periodic table for each atom in the formula, multiplied by how many of each there are.
The Grams to Moles Calculator uses the formula: Moles = Mass of substance ÷ Molar Mass of substance. For example, with mass of substance of 18 g and molar mass of 18 g/mol, the moles is 1.0000.
Enter the mass of substance. Enter the molar mass. Read off your moles — the calculator updates automatically, with no button to press.
Related guides
How to Calculate Grams to Moles: Formula, Steps & Examples
Learn how to calculate Grams to Moles — the formula explained step by step, with worked examples and a free calculator to check your answer.