From Equation to Bench

The balanced equation predicts exactly how much product a reaction should make. This percent yield calculator compares that theoretical mass against what you actually recovered, turning lab results into the yield percentage that appears in every chemistry report.

Where the Product Goes

Side reactions consume starting material. Equilibrium reactions stop short of completion. Products stick to glassware, get lost in transfers, or dissolve during washing. Each of these shaves points off the yield — and the percentage tells you how much of the loss is worth chasing.

Interpreting the Number

Pair the yield with the efficiency verdict: above 90% is a clean reaction, 75–90% is typical lab fare, and anything below 50% is worth troubleshooting step by step. A yield over 100% means the product is wet or contaminated — dry it and reweigh.