The Mole Fraction Calculator lets you compute the composition of a mixture in terms of mole fraction and mass fraction. Add any number of components and enter each component as either moles or mass (with molar mass) — the tool converts masses to moles where molar mass is provided. It then reports total moles, mole fraction (x), mole percent, and when possible mass (g), mass fraction, and mass percent for every component. This calculator is ideal for chemistry students and lab work when preparing mixtures, performing equilibrium or gas calculations, and converting between mole- and mass-based compositions. Always double-check inputs (units and molar masses) for accurate results.