Single Calculation
Example Data & Batch Mode
Edit the table or add rows to calculate percent yield across multiple experiments instantly.
| Experiment | Actual (g) | Theoretical (g) | % Yield | Actions |
|---|---|---|---|---|
| Trial 1 | 7.80 | 9.10 | ||
| Trial 2 | 5.42 | 8.00 | ||
| Trial 3 | 10.1 | 10.6 | ||
| Trial 4 | 3.25 | 6.50 | ||
| Trial 5 | 12.0 | 14.2 |
Tip: Double‑click cells to edit. Use the buttons to export.
Formula Used
The percent yield quantifies the efficiency of a reaction:
% yield = ( actual yield / theoretical yield ) × 100
- Actual yield is the measured amount of product obtained after workup and isolation.
- Theoretical yield is the maximum amount predicted by stoichiometry from the limiting reagent, assuming complete conversion and no losses.
Values slightly above 100% usually indicate wet product, scale or container contamination, weighing errors, or incomplete drying of solids.
How to Use This Calculator
- Enter the measured Actual yield and choose its unit.
- Enter the Theoretical yield from your limiting‑reagent calculation and choose its unit.
- Optionally pick the number of Significant figures for rounding.
- Click Calculate to see the percent yield and a brief interpretation.
- Use Export Result to save the single calculation as CSV or PDF.
- Switch to Example Data & Batch Mode to compute multiple experiments and export the whole table.
FAQs
It is the ratio of the actual amount of product obtained to the theoretical amount predicted by stoichiometry, expressed as a percentage.
Yes, values above 100% typically flag experimental issues such as moisture, impurities, calibration drift, or incomplete drying of the isolated product.
Use a balanced equation to identify the limiting reagent, convert moles to product moles using stoichiometric coefficients, then multiply by product molar mass to obtain mass.
Select mg, g, kg, oz, or lb. The tool converts both entries internally to grams so the ratio is unit‑consistent.
Choose a target; otherwise the calculator infers precision from your inputs. Trailing zeros are managed to reflect the selected significant‑figure setting.
Side reactions, incomplete conversion, product loss during transfers or purification, and measurement error all reduce yield. Improving workup and reaction optimization usually helps.