Percent Yield Calculator
Percent yield = (actual / theoretical) × 100. Quantifies reaction efficiency.
Result
General calculation reads
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How to use this calculator
- Enter both yields in matching units.
- Read percent yield.
About this calculator
Reactions don't always give 100% of the theoretical product — some is lost to side reactions, transfers, evaporation, or incomplete conversion. Percent yield = (actual product / theoretical product) × 100. Below 50% suggests a problem; above 100% means measurement error or contamination.
Frequently asked
Can yield exceed 100%?+
What's a good yield?+
How to improve yield?+
Yield in moles or grams?+
Theoretical yield from limiting reactant?+
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