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Molar Ratio Calculator

Result

Calculated result 0.6666666667 Based on the values entered.
↗ Chemistry

Molar Ratio Calculator The Molar Ratio Calculator simplifies the ratio between the moles of two substances in a reaction. Enter the moles of each to get the mole ratio in lowest terms. — free online calculator.

Formula

Mole Ratio = Moles of A : Moles of B (simplified)
  • Molar Ratio Calculator calculates its result from Moles Of A, Moles Of B Simplified. It uses the formula Mole Ratio = Moles of A : Moles of B (simplified). Change any input to recalculate the result instantly.
  • The main inputs are Moles Of A, Moles Of B Simplified. Enter them in the units and format shown in the calculator.
  • Use the units, labels and assumptions shown beside each input so the formula is applied consistently.
  • Changing any input above recalculates the result with the same calculation engine used by this page.

Example: Molar Ratio

Inputs
  • Moles Of A: 2
  • Moles Of B Simplified: 3

Using Moles Of A = 2, Moles Of B Simplified = 3, the calculated result is 0.6666666667.

Sample result: Calculating…

Frequently asked questions

What does the Molar Ratio calculate?

Molar Ratio Calculator The Molar Ratio Calculator simplifies the ratio between the moles of two substances in a reaction. Enter the moles of each to get the mole ratio in lowest terms. — free online calculator.

Which values should I enter?

Enter Moles Of A, Moles Of B Simplified using the units and format shown beside each field.

What formula does this calculator use?

The calculator uses the following relationship: Mole Ratio = Moles of A : Moles of B (simplified).

Why might my result differ from another source?

Results can differ when another source uses different units, rounding rules, conventions or assumptions. Compare the inputs and definitions before comparing results.

Does the result update automatically?

Yes. Changing an input updates the result using the same calculation engine shown on this page.

Page information

Updated: October 7, 2026