About the Percent Composition Calculator

The percent composition of a compound represents the mass percentage of each element in the compound. It's calculated by:

How to use this calculator

Method 1: By Chemical Formula

1. Enter the chemical formula (e.g., H2O, C6H12O6)
2. The calculator will automatically fetch atomic masses
3. Click "Calculate"

Method 2: By Elements

1. Add each element to your compound
2. Enter the element symbol, number of atoms, and atomic mass
3. Click "Calculate"

Applications

• Determining empirical formulas from experimental data
• Analyzing chemical purity
• Calculating reactant proportions
• Nutritional analysis of compounds