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Theoretical Yield Calculator

Calculate the theoretical yield of a chemical reaction in grams or moles. Determine limiting reagents.

Last updated: 2/3/2026

Theoretical yield is the maximum amount of product that can be generated from a given amount of reactant, assuming a perfect chemical reaction.

Calculator Inputs

From balanced equation (e.g. the "2" in 2A -> B)

To calculate percent yield

Results

Enter values above to see your results

How It Works

Convert reactant mass to moles, apply the mole ratio from the balanced equation, and convert product moles back to grams.

Worked Examples

Reaction A -> B (1:1 ratio)

Reactant Moles:10g / 100g/mol= 0.1 mol
Product Moles:0.1 mol * (1/1)= 0.1 mol
Theoretical Yield:0.1 mol * 150g/mol= 15g

Tips & Best Practices

  • Always start with a balanced chemical equation.
  • Find molar masses using the periodic table.

Frequently Asked Questions

What is percent yield?

Percent Yield = (Actual Yield / Theoretical Yield) * 100%. It measures efficiency.