Calculate percent composition of elements.
Percent composition for Composition Percentage shows how much of a compound's mass each element contributes, which is the basis for empirical formulas. Elements combine in fixed mass ratios, so composition identifies a compound and its formula.
Composition Percentage
Percent composition = element mass / compound mass x 100
Percent composition = element mass / compound mass x 100 Percent composition for Composition Percentage shows how much of a compound's mass each element contributes, which is the basis for empirical formulas.
Elements combine in fixed mass ratios, so composition identifies a compound and its formula.
This calculator takes 3 inputs: Element mass, Compound mass, Molar mass. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.