Molar Ratio Calculator

Find moles of one species from a balanced ratio.

Moles of B (mol) 6

Formula: moles B = moles A × (coeff B ÷ coeff A)

Step-by-step with your numbers:

1. Values used:

2. Moles of A = 4 mol

3. Coefficient of A = 2

4. Coefficient of B = 3

6. Moles of B = Moles of A + Coefficient of A = 4 + 2 = 6mol

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Use the coefficients of a balanced equation to convert between species.

The math behind it

moles B = moles A × (coefficient of B ÷ coefficient of A).

4 mol A, ratio 2:3 → 6 mol B.

Need balancing?

Yes — coefficients come from the balanced equation.