Mole Fraction Calculator
🧪 Solutions & Molarity. Use the Mole fraction formula to find mole fraction, moles of a, total moles: pick the value you want, type the others, and the answer updates as you go.
Mole fraction0.25
Pick the ○ next to the value you want to find, fill in the others, and it solves as you type.
What each letter means
| Quantity | Unit |
|---|---|
| Mole fraction | no unit |
| Moles of A | mol |
| Total moles | mol |
Worked example
Find the mole fraction when Moles of A = 1 mol, Total moles = 4 mol.
Using XA = nAntotal: Mole fraction = 0.25.
Frequently asked questions
What is the formula for Mole fraction?
XA = nAntotal.
What do the letters stand for, and what units are used?
Mole fraction, Moles of A in mol, Total moles in mol.
How do you calculate mole fraction?
Put the values into XA = nAntotal. For example, with Moles of A = 1 mol, Total moles = 4 mol, mole fraction = 0.25.
Can I solve for a different value?
Yes. In the calculator above, pick the circle next to any value (mole fraction, moles of a, total moles) and fill in the others: it rearranges the formula for you.
