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.

Formula

Mole Ratio = Moles of A : Moles of B (simplified)
  • Mole ratios come from the coefficients of a balanced chemical equation.
  • They let you convert between amounts of reactants and products.

2 mol A to 6 mol B

Inputs
  • Moles of A: 2
  • Moles of B: 6

2:6 simplifies to 1:3 — three moles of B per mole of A.

Frequently asked questions

What is a mole ratio used for?
It converts between the amounts of substances in a reaction, based on the balanced equation's coefficients.