Mole ratio calculator
Mole ratio from balanced coefficients and optional conversion from moles of A to moles of B.
Calculator
How to use
Mole ratio
For a A + b B + …,
$$\frac{n_B}{n_A} = \frac{b}{a}$$
When to use
- Quick setup for any stoichiometry step that stays in moles.
Educational use only. Double-check values for labs, homework, and exams.