Stoichiometry Calculator
Convert reactant amounts into theoretical product yield using balanced-equation mole ratios
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Coefficients must come from a correctly balanced chemical equation before mole-ratio calculations are meaningful.
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Test changes in reactant mass and reaction efficiency without changing your main result.
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It converts reactant mass to moles, applies the balanced-equation coefficient ratio, then converts product moles into theoretical product mass.
Theoretical yield is the maximum product amount predicted from the selected reactant when the reaction proceeds completely with no losses or side reactions.
A result above 100% usually indicates wet or impure product, measurement error, an incorrect equation or molar mass, or an unaccounted limiting reactant.
Results are estimates generated locally from the masses, molar masses and coefficients you enter. They assume a correctly balanced equation, pure reagents, complete reaction and the selected reactant as the limiting reagent. Real yields can differ because of reagent purity, competing reactions, incomplete conversion, transfer losses and measurement uncertainty. Verify calculations with your laboratory procedure and qualified supervision.
