Percent Yield Calculator

Percent Yield is nothing but the measure of a synthetic procedure's effectiveness. In simple words, it tells us how well we performed a chemical reaction.

In chemistry, percent yield is defined as the ratio of experimental yield to theoretical yield. Percent Yield in general is lower than 100% as the actual yield we obtain after a reaction is always less than the theoretical value. However, it can be greater than 100% at times indicating more sample was recovered from a reaction than the initial predicted yield.

Percent Yield can be found by simply dividing the experimental yield or actual yield with the theoretical yield and then multiplying with 100. In the case of actual yield and theoretical yield being the same, the Percent Yield would be 100%.

Percent Yield = Actual Yield/Theoretical Yield * 100

where,

• Actual yield - It is the amount of product you get in a chemical reaction
• Theoretical yield - it is the amount of product you get from the stoichiometric or balanced equation, y making using of the limiting reactant to determine the product

By now, you might have understood that in order to obtain the Percent Yield you need both the actual yield and theoretical yield of your reactants. Go through the step-by-step guide provided here to find the Percentage Yield.

• The first and foremost step is to make sure both the weights are in the same units.
• Now divide the experimental yield value with the theoretical yield value.
• Multiply the result obtained in the earlier step with 100 to determine the Percentage Yield.

Question 1: If the percentage yield is 55% with the theoretical yield as 6g, what would the actual yield be? Calculate using the percentage yield formula.
Solution:

Given Percent Yield = 55%

Theoretical Yield = 6g

We know the formula to calculate Percentage Yield = (Actual Yield/Theoretical Yield)*100%

Substituting the input values we have the equation as follows

55 = (Actual Yield/6)*100

55/100 =Actual Yield/6

(55*6)/100 = Actual Yield

Actual Yield = 3.3 grams

Therefore, the Actual Yield is 3.3 grams

Question 2: During a chemical reaction 2.7 g of product is made. The maximum calculated yield is 4.5 g. What is the percent yield of this reaction?
Solution:Given Actual Yield = 2.7 g

Theoretical Yield = 4.5 g

We know the formula to calculate Percent Yield = (Actual Yield/Theoretical Yield)*100%

Substituting the input values we have the equation as such

Percent Yield = 2.7/4.5*100 %

= 60%

Therefore Percent Yield of the reaction is 60%.

1. What is meant by Percent Yield?

Percent Yield is nothing but the ratio of experimental yield to theoretical yield and then multiplying the result with 100.

2. What is the Percentage Yield Formula?

The formula to calculate the Percentage Yield Formula is (Actual Yield/Theoretical Yield)*100 %

3. Is it better to have a high or low percent yield?

It is better to have a high percent yield as it suggests only a few impurities have occurred in the experiment.

4. What does a 100% Percent Yield mean?

A 100% Percent Yield indicates both the actual and theoretical yield is the same.