Percent Yield Calculator

How to Calculate Percent Yield in Chemistry

Percent yield is a key metric in laboratory and industrial chemistry used to measure the efficiency of a chemical reaction. It compares the amount of product actually obtained (actual yield) to the maximum possible amount that could be produced according to stoichiometry (theoretical yield). For related chemistry calculations, try our Empirical Formula Calculator or Molarity Calculator.

Percent Yield Formulas

The formulas used to solve for the variables are:

• Percent Yield (%): Percent Yield = (Actual Yield / Theoretical Yield) * 100
• Actual Yield: Actual Yield = (Percent Yield / 100) * Theoretical Yield
• Theoretical Yield: Theoretical Yield = Actual Yield / (Percent Yield / 100)

Step-by-Step Worked Example

Suppose a reaction has a theoretical yield of 25.0 grams of ethyl acetate, but when you run the experiment, you recover and dry 19.5 grams of product:

1. Identify Actual Yield: 19.5 g
2. Identify Theoretical Yield: 25.0 g
3. Apply Formula: (19.5 / 25.0) * 100
4. Result: 0.78 * 100 = 78%. The reaction had a 78.00% yield.

Also check: Empirical Formula Calculator, Molecular Weight Calculator, Molarity Calculator, Percent Error Calculator, Percentage Calculator, STP Calculator.