Grams To Moles Calculator
How many moles are in this mass of a substance? Enter the stated values to calculate this model.
Reference calculation or estimate for example inputs; assumptions and limitations apply.
Calculations run in your browser.
What to enter
| Input | Meaning and units |
|---|---|
| Mass (g) | Enter mass in g; use the same basis as the other measurements. |
| Molar mass (g/mol) | Enter molar mass in g/mol; use the same basis as the other measurements. |
Understanding your result
The result is a scientific reference calculation under the model assumptions on this page. It does not assess hazards, chemical compatibility, purity, solubility, equipment limits or clinical meaning.
Common mistakes
- Using solvent volume in place of final solution volume, or mass concentration in place of molar concentration.
- Ignoring units, reaction coefficients, activity assumptions or the stated temperature/model limits.
Check your calculation
- Check the units and balance/coefficients against the worked example. For real laboratory work, verify SDS information and the applicable procedure independently.
Calculation checks, sources and review limits
How many moles are in this mass of a substance?
How many moles are in this mass of a substance? Enter the stated values to calculate this model.
Common uses
- How many moles are in this mass of a substance
How it works
Divide the sample mass in grams by the stated molar mass in grams per mole. Use the formula/isotope/hydrate that matches the sample.
Worked example
Enter Mass: 18 g; Molar mass: 18 g/mol. Results: Amount: 1 mol.