Chemical engineering apps: Weight Fraction to Mole Fraction Converter

Thursday, September 10, 2026

Complete 118-Element Periodic Table & Fraction Converter

Instructions:

Click on any element in the Interactive Periodic Table to inspect its properties or insert it directly into your active chemical component card.
Construct molecules by adding element rows and entering stoichiometric atom counts.
Provide the Weight Fraction ($w_i$) for each component (total sum must equal 1.0).
Click Calculate Mole Fractions for automated conversion.

Interactive Periodic Table Click an element to add it to the active component card

Selected Element: None Atomic Number (Z): - Symbol: - Standard Atomic Weight: - g/mol

Mathematical Formulation:

Molecular weight ($M_i$) of component $i$ composed of stoichiometric coefficients ($n_j$) and atomic weights ($A_j$):

$$M_i = \sum_{j} (n_j \cdot A_j)$$

The mole fraction ($x_i$) from weight fractions ($w_i$) in an $N$-component mixture:

$$x_i = \frac{\frac{w_i}{M_i}}{\sum_{k=1}^{N} \frac{w_k}{M_k}}$$

Component	Formula	Mol. Weight ($g/mol$)	Weight Fraction ($w_i$)	Mole Fraction ($x_i$)

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