Percent yield calculator
Fill in what you know and leave the unknown box empty — it works out whichever one is missing. Nothing is uploaded; the arithmetic happens in your browser.
The formula
yield % = (actual ÷ theoretical) × 100
Where this usually goes wrong
Both masses must be in the same unit. A yield over 100% means wet product or a weighing error, not a better reaction.
Worked example
8.2 g of a possible 10 g is 82%.
Those numbers are already in the boxes above — press Work it out to see it, then change them for your own.
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