Chemistry calculator
Percent Yield Calculator
Compare experimental yield with the maximum theoretical yield.
Both yields must use the same unit; theoretical yield must be greater than zero.
Percent yield
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How it works
Actual and theoretical yield must use the same units. Values above 100% can indicate impurities, residual solvent, or measurement error.
Percent yield = actual yield ÷ theoretical yield × 100
Worked example
An actual yield of 8 g from a theoretical 10 g gives an 80% yield.
How to use this tool
- Enter the known values and choose units where available.
- Check the primary result and supporting details.
- Clear or replace an input to calculate another case.
Frequently asked questions
What happens with invalid or incomplete inputs?
The result remains blank until the required inputs form a finite, meaningful calculation. Zero denominators and physically impossible negative quantities are not calculated.
Can I use decimal values?
Yes. The tool accepts decimals and keeps full precision for the calculation while rounding the displayed result for readability.