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Molar Ratio Calculator

Chemistry
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Calculates the molar ratio between two substances in a balanced chemical equation.

More tools:Science & Lab Calculators
How To Use

How to use this calculator

Start with your values, or try a preset.

Step 1

Enter Moles of Substance A, Coefficient of Substance A in Balanced Equation, and Coefficient of Substance B in Balanced Equation in the units shown.

Step 2

Read Molar Ratio (B/A) and Moles of Substance B in the results panel. Results update as you change the inputs.

Step 3

Choose a preset to load an example, then adjust the values for your situation.

Worked Examples

Example calculations

See the inputs and their calculated results.

Simple 1:1 Ratio

Moles of Substance A: 2 mol; Coefficient of Substance A in Balanced Equation: 1; Coefficient of Substance B in Balanced Equation: 1

Molar Ratio (B/A): 1; Moles of Substance B: 2 mol

2:1 Ratio

Moles of Substance A: 2 mol; Coefficient of Substance A in Balanced Equation: 1; Coefficient of Substance B in Balanced Equation: 2

Molar Ratio (B/A): 2; Moles of Substance B: 4 mol

1:2 Ratio

Moles of Substance A: 2 mol; Coefficient of Substance A in Balanced Equation: 2; Coefficient of Substance B in Balanced Equation: 1

Molar Ratio (B/A): 0.5; Moles of Substance B: 1 mol

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