About the Mole Fraction Calculator
Mole fraction of solute and solvent in a two-component mixture, with mole percent.
Also known as: mole percent, chi calculator, mole fraction formula, raoults law.
How to use this calculator
- Enter solute formula, mass of solute, solvent formula, mass of solvent.
- The result updates instantly as you type — press Calculate (or Enter) at any time.
- Review the breakdown shown under the main result.
- Use Copy result or Share to save the answer or send a link with your inputs.
Formula
χ₁ = n₁ / (n₁ + n₂)
Worked example
Using the values pre-filled in the calculator above:
- Solute formula: C2H6O
- Mass of solute = 46 g
- Solvent formula: H2O
- Mass of solvent = 180 g
the calculator returns:
- Mole fraction of solute: 0.090854
- Mole fraction of solvent: 0.909146
- Mole percent of solute: 9.0854 %
- Moles of solute: 0.9985 mol