Moles from Mass Calculator
⚗ Moles & Stoichiometry. Use the Moles from mass formula to find amount, mass, molar mass: pick the value you want, type the others, and the answer updates as you go.
Amount0.5 mol
Pick the ○ next to the value you want to find, fill in the others, and it solves as you type.
What each letter means
| Quantity | Unit |
|---|---|
| Amount | mol |
| Mass | g |
| Molar mass | g/mol |
Worked example
Find the amount when Mass = 9 g, Molar mass = 18 g/mol.
Using n = m/M: Amount = 0.5 mol.
Frequently asked questions
What is the formula for Moles from mass?
n = m/M.
What do the letters stand for, and what units are used?
Amount in mol, Mass in g, Molar mass in g/mol.
How do you calculate amount?
Put the values into n = m/M. For example, with Mass = 9 g, Molar mass = 18 g/mol, amount = 0.5 mol.
Can I solve for a different value?
Yes. In the calculator above, pick the circle next to any value (amount, mass, molar mass) and fill in the others: it rearranges the formula for you.
