What you provide
What you provide
- Element mass in one mole expressed in g/mol, using the same scenario as the other inputs
- Compound molar mass expressed in g/mol, using the same scenario as the other inputs
CHEMISTRY / STOICHIOMETRY
Percent Composition Calculator
Calculate an element mass percentage in a compound. Review the equation, substituted values, result, assumptions, and interpretation in one guided workspace.
- 01 Calculated in this tab
- 02 Values stay in this browser tab
- 03 Use boundary
Use boundary
Calculation path
Calculate an element mass percentage in a compound. The page evaluates the displayed equation from your supplied values and presents both symbolic and substituted KaTeX working so the arithmetic can be checked.
Calculation path
percent=100m_element/M_compound
What you receive
What you receive
- Mass percent in % from the stated equation
- A symbolic formula plus substituted working with your values
- Visible assumptions, field guidance, and an authoritative learning reference
Use boundary
Choose the maximum decimal places shown. This does not increase source accuracy.
This calculation is not a laboratory procedure; verify purity, units, hazards, activities, and conditions.
Use internally consistent units and retain extra precision when carrying the result into another calculation.
Reviewed reference factors