Enter your Balanced Chemical Equation and Desired Product Formula into the Atom Economy Calculator, specify the Product Coefficient, and calculate your reaction's Atom Economy — plus Waste Percentage, Desired Product Mass, and Total Reactant Mass, with an optional step-by-step breakdown showing exactly how the numbers come together.
Atom Economy
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Waste Percentage
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Desired Product Mass
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Total Reactant Mass
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Atom economy is a measure of how efficiently atoms from reactants are incorporated into the desired product. It's expressed as a percentage and indicates how much of the starting materials ends up in the useful product versus waste.
Atom economy = (Mass of desired product / Total mass of reactants) × 100%. You need the molecular weights of all reactants and the desired product, along with their coefficients from the balanced equation.
Atom economy is theoretical and based on the balanced equation, showing maximum possible efficiency. Yield is experimental and shows actual product obtained versus theoretical maximum, accounting for incomplete reactions and side reactions.
High atom economy means less waste production, making chemical processes more environmentally friendly and cost-effective. It's a key principle in green chemistry for sustainable manufacturing.
Multiply the molecular weight of the desired product by its coefficient, then divide by the sum of all reactant molecular weights multiplied by their coefficients. Convert to percentage by multiplying by 100.
A reaction has 100% atom economy when all atoms from the reactants are incorporated into the desired product with no waste products formed. Addition reactions typically have high atom economies.
No, atom economy cannot exceed 100% as it represents the fraction of reactant mass that becomes the desired product. Values above 100% would indicate an error in calculation or equation balancing.