basic

Mole Fraction Calculator

Mole fraction of a solute in a solution.

Compute the mole fraction of a solute (and the solvent) from the moles of each component.

Daniel Oh By Daniel Oh
Reviewed by Dr. Helena Ortiz
Published Last reviewed 1 min read

Inputs

Results

Enter values and click Calculate to see results.
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How to use this calculator

  1. Fill in the inputs above using the units you already have.
  2. Values update automatically as you type — no submit button needed.
  3. Hover any result row for the underlying formula and intermediate values.

Formula

x_A = n_A / (n_A + n_B)

In depth

Compute the mole fraction of a solute (and the solvent) from the moles of each component.