Rendimento (%)
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
About this calculator
The yield (%) calculator determines the efficiency of a chemical reaction by comparing the actual yield (mass or volume) to the theoretical yield calculated via stoichiometry. The result is a percentage showing how close the process is to the ideal scenario.
The formula used is η = (actual yield / theoretical yield) × 100. The theoretical yield is based on stoichiometric ratios, assuming pure reactants and complete conversion. The actual yield is experimentally measured in labs or industrial settings.
This tool is crucial for chemical experiments, industrial process analysis, and academic research. Examples include compound synthesis, substance purification, and reaction optimization. It helps identify losses from impurities, side reactions, or measurement errors.
Note: The theoretical yield assumes ideal conditions, such as pure reactants and full conversion. In reality, factors like contamination, uncontrolled temperature, and by-product formation often lower the yield. Always validate experimental data with repeated trials.
Frequently asked questions
Why is the actual yield rarely 100%?
Common causes include impurities in reactants, side reactions, and experimental losses. Real-world conditions often deviate from stoichiometric assumptions.
How to calculate theoretical yield manually?
Determine stoichiometric ratios from a balanced equation, identify the limiting reactant, and compute the expected mass or volume based on it.
What units should I use for theoretical and actual yield?
Use the same units (grams, liters, moles) for both. The ratio is unitless, but consistency ensures accurate results.
When to use this calculator in industrial processes?
To optimize large-scale reactions, such as fertilizer, pharmaceutical, or fuel production. It helps reduce costs and waste by improving efficiency.