Grams to Moles Calculator Formula
Understand the math behind the grams to moles calculator. Each variable explained with a worked example.
Formulas Used
Moles
moles = grams / molar_massVariables
| Variable | Description | Default |
|---|---|---|
grams | Mass(g) | 36.03 |
molar_mass | Molar Mass(g/mol) | 18.015 |
How It Works
How to Convert Grams to Moles
Formula
moles = mass (g) / molar mass (g/mol)
Worked Example
Convert 36.03 g of water to moles.
grams = 36.03molar_mass = 18.015
- 01moles = 36.03 / 18.015
- 02moles = 2.0 mol
Frequently Asked Questions
When would I need to convert grams to moles?
Stoichiometry calculations require moles. You weigh substances in grams but need moles to determine reaction ratios.
Can I convert grams to moles without molar mass?
No. Molar mass is required because different substances have different masses per mole.
What is a mole?
A mole is 6.022 × 10^23 particles (Avogadro's number). It is the SI unit for amount of substance.
Ready to run the numbers?
Open Grams to Moles Calculator