Mole Calculator
Compute the amount of substance (moles) from mass and molar mass using n = m / M.
Input Data
Mass
Molar Mass
Results
1
Moles n = m/M = 18/18 = 1 mol.
At a glance:Moles n = m / M (m mass g, M molar mass g/mol). Complementary to molecular-weight and molarity.
Formula
n = m / M.
How to Use
- Enter the mass and molar mass.
- The tool gives the moles.
Case Studies
18g H₂O (M=18) → 1 mol
18/18 = 1.
FAQ
What is M?
Sum of atomic weights from the periodic table.
Relation to molecular-weight?
Molecular-weight gives M; this uses M to find n.
Applications?
Stoichiometry.
Precision?
4 decimal places.
Related Tools
References
Content review: Calculatorism Science Team. Results are for reference only; please refer to the relevant authorities for the official figures.