Atom Economy Calculator
Enter balanced reaction items and select the target product. This calculator uses the entered molar masses; it does not parse formulas or calculate actual yield.
A QUICK WALKTHROUGH
How to use this tool
- Enter at least one reactant and one product with a coefficient and molar mass.
- Mark the product or products counted as the target product.
- Calculate atom economy from target product mass divided by total product mass.
Transparent calculation contract
For the entered balanced equation, each item contributes coefficient × molar mass. Atom economy = total target-product molar mass ÷ total product molar mass × 100%. Enter the molar masses you want to use.
Scope and limits
This tool does not parse chemical formulas, identify substances, validate balancing, or use a built-in substance database. It calculates theoretical atom economy only and does not calculate actual reaction yield.
GOOD TO KNOW
Common questions
Do I need a balanced equation?
Yes. The calculation assumes that the coefficients you enter belong to a balanced equation.
Can I select more than one target product?
Yes. Select every product that should be included in the target-product numerator.