Percent Composition Calculator

    Calculate the percentage by mass of each element in a compound or mixture.

    Calculate Percent Composition

    About Percent Composition

    Percent composition is a way of expressing the relative amounts of different elements in a compound or components in a mixture. It is typically calculated as a percentage by mass, showing how much of the total mass is contributed by each element or component.

    •Features

    • –Calculate mass percentages for any number of elements or components
    • –Add or remove elements dynamically
    • –View both mass and percentage contribution of each component
    • –Suitable for both chemical compounds and mixtures

    •How to Use

    1. 1.Enter the symbol or name for each element/component
    2. 2.Input the mass for each element/component in grams
    3. 3.Add more elements if needed using the "Add Element" button
    4. 4.Click "Calculate Percentages" to see the composition breakdown

    •Key Concepts

    • –Percent by Mass: (Mass of component ÷ Total mass) × 100%
    • –Total Percentage: Sum of all percentages should equal 100%
    • –Applications: Chemical analysis, quality control, formulation
    • –Units: Input masses in consistent units (typically grams)

    •Formula Used

    • –Mass Percentage: % = (Mass of component ÷ Total mass) × 100
    • –Example: In H2O, %H = (2 × 1.008 ÷ 18.015) × 100 = 11.19%
    • –Total Mass: Sum of all component masses
    • –Validation: Sum of all percentages must equal 100%

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