Molar Ratio Calculator
Enter mole amounts for reactants or products to obtain the simplest whole-number stoichiometric ratio.
Simplest whole-number ratio
2 : 5 : 7
Normalized relative to the smallest component:
- Component 1: 1.000
- Component 2: 2.500
- Component 3: 3.500
How to Use This Calculator
Gather mole data
Calculate molar amounts for each component (from masses or experimental data).
Enter each component
Add inputs for all species and specify their mole quantities.
Review normalized ratios
The calculator divides by the smallest value and reduces to the simplest whole numbers.
Apply the ratio
Use the ratio to write empirical formulas or balanced chemical equations.
Formula
nᵢ(normalized) = nᵢ / min(n) , Reduced ratio = normalize to integer values
Divide each mole count by the smallest count, then scale to whole numbers by multiplying by a common factor if necessary.
Example
For mole amounts 1.5, 3.0, 4.5, dividing by 1.5 yields 1 : 2 : 3.
Full Description
Molar ratios help convert measured amounts into balanced chemical equations or empirical formulas. This calculator normalizes mole amounts to the smallest value and simplifies the resulting ratio.
Adjust the components based on experimental data to derive the simplest integer relationship between reactants or products.
Frequently Asked Questions
Can I use masses instead of moles?
Convert masses to moles first by dividing by molar mass. Then enter moles for accurate ratios.
What if ratios aren’t whole numbers?
Multiply all normalized values by a common factor (2, 3, etc.) to obtain whole numbers.
Is the order important?
No. Ratios are relative. Just maintain consistency with component labeling when writing equations.
How precise should moles be?
Carry enough significant figures to avoid rounding errors, especially before normalization.
Can I reset inputs?
Remove components using the remove buttons or refresh the page to start over.