About the Percent Yield Calculator
Percent yield from actual and theoretical yield, or the actual yield from a target percentage.
Also known as: reaction yield, actual yield calculator, yield percentage, percentage yield.
How to use this calculator
- Enter calculate.
- The result updates instantly as you type — press Calculate (or Enter) at any time.
- Review the breakdown shown under the main result.
- Use Copy result or Share to save the answer or send a link with your inputs.
Formula
% yield = actual yield ÷ theoretical yield × 100
Worked example
Using the values pre-filled in the calculator above:
- Calculate: Percent yield
- Actual yield = 8.5 g
- Theoretical yield = 10 g
the calculator returns:
- Percent yield: 85%
- Product lost: 1.5 g
- Quality: Good