Moles from mass calculator
Convert grams to moles using molar mass (g/mol).
Calculator
How to use
Moles from mass
$$n = \frac{m}{M}$$
- $m$ in grams, $M$ in g/mol.
- Works for any pure substance once you know M.
When to use
- Weighing a solid before making a solution.
- Stoichiometry steps between mass and mole amounts.
Educational use only. Double-check values for labs, homework, and exams.