Percent Yield Calculator

What Is a Percent Yield Calculator?

Percent yield compares how much product a chemical reaction actually produced (actual yield) to how much it should have produced based on stoichiometry (theoretical yield). It's a key measure of a reaction's real-world efficiency.

How to Use This Percent Yield Calculator

1. Enter the actual yield obtained from the experiment, in grams.
2. Enter the theoretical yield calculated from the balanced equation, in grams.
3. Click Calculate to get the percent yield.

Formula

• Percent Yield = (actual yield / theoretical yield) × 100

Worked Example

A reaction was expected to produce 50 g of product (theoretical), but only 42 g was actually collected. Percent Yield = (42/50) × 100 = 84%.