Determine the maximum amount of product that can be formed from a given amount of limiting reactant.
Stoichiometry Parameters
g
g/mol
g/mol
g
Yield Analysis
Enter mass and reaction details
About this calculator
Overview
Theoretical Yield is the maximum amount of product that can be generated from a reaction, assuming perfect efficiency. It is the gold standard that chemists use to evaluate how successful their real-world experiments were.
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Pro Tips
The 'Limiting Reactant' is the one that runs out first and stops the reaction. Theoretical yield is always based on it.
Mole Ratio comes from the coefficients in a balanced equation (e.g., in 2H₂ + O₂ → 2H₂O, the ratio of H₂O to O₂ is 2:1).
Ensure all molecular weights (MW) are accurate; small errors here propagate through the entire calculation.
Percent Yield = (Actual Yield / Theoretical Yield) × 100%. Values above 100% usually mean your product is wet or impure.
Side reactions are the most common reason for a low yield - some reactants turn into unwanted chemicals.
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Fun Facts
"The Haber process for making ammonia only has about a 15% yield per pass, but the unreacted gases are recycled over and over to achieve nearly 97% total yield."
"In total synthesis of complex drugs, a chemist might perform 30 steps. If each step has a 90% yield, the final overall yield is only 4% (0.9³⁰)!"
"Modern 'Green Chemistry' focuses on 'Atom Economy'—designing reactions where every atom of the reactant ends up in the final product, resulting in zero waste."
"Cooking is just high-temperature organic chemistry. When you bake bread, the 'yield' of carbon dioxide determines how well the bread rises."
"The discovery of catalysts earned several Nobel Prizes because they allow reactions to achieve higher yields at lower temperatures and pressures."
