Reaction Yield Calculator

Compare the amount actually obtained with the theoretical maximum, or calculate one of those values from the other two.

Tool%

Quantity to calculate

Theoretical amount

Actual amount

Yield

Amount unit

Example

8.2 g obtained instead of 10.0 g theoretical

Percent yield = actual/theoretical × 100. Here, 8.2/10.0 × 100 = 82%. The two amounts must describe the same product and use the same unit.

Theoretical yield comes first

The theoretical amount is usually obtained from stoichiometry and the limiting reactant. This calculator then compares that maximum with the isolated or measured amount.

A value above 100% is possible as a calculation result, but it usually means the product contains solvent or impurities, the measurement is wrong, or the theoretical amount was not defined correctly.