How to use this calculator
- Select percent yield, actual yield, or theoretical yield as the unknown.
- Select mass or amount and choose a matching unit.
- Enter the two known values and calculate.
Formula and variables
percent yield = actual / theoretical × 100
| Symbol | Meaning | Unit |
|---|---|---|
| Yactual | actual recovered yield | mass or amount |
| Ytheoretical | theoretical yield | same dimension |
Worked example
An actual yield of 8.5 g from a theoretical 10.0 g is 85%.
Interpretation
Percent yield compares recovered product to the reaction's theoretical maximum in a compatible dimension.
Common mistakes
- Actual and theoretical quantities must use compatible dimensions.
- A zero theoretical yield is undefined.
Frequently asked questions
Can the calculator solve for actual yield?
Yes. Select Actual yield and enter the theoretical yield and percent yield.
Can percent yield exceed 100 percent?
Yes. A value above 100 percent often indicates impurities, residual solvent, or a measurement error.
Must both yields use the same unit?
Yes. Use one compatible mass unit or one compatible amount unit for both yields.
Can I use scientific notation?
Yes. Enter values such as 6.022e23 or 1.0e-6 in a numeric field.
How should I round the result?
Keep extra digits during the calculation. Round the final result to the precision required by your data.