Theoretical Yield Calculator

01 Set up your calculation

1. Identify the limiting reactant using all starting quantities.
2. Enter its mass and molar mass, then both coefficients from the balanced equation.
3. Enter the product molar mass and read the theoretical product quantity.

02 The relationship

For the assumptions behind these results, read the explanation below. You can also explore Molar Ratio and Percent Yield.

03 Work through mass, moles, and mass again

The calculation first converts the available limiting-reactant mass into moles. The balanced coefficients then convert reactant moles into product moles. Finally, multiplying by the product’s molar mass gives the maximum product mass.

The reactant and product molar masses are separate properties. Reusing the reactant’s molar mass for the product is only correct if they happen to have the same value.

04 The limiting reactant must be established first

This tool assumes that the entered reactant is limiting and that the other required reactants are available in sufficient amounts. If you are uncertain, calculate the possible product amount from each reactant; the smallest available amount controls the theoretical yield.

The result assumes the stated reaction goes to completion without competing processes. Use measured or expected percentage yield separately to estimate an actual recovered quantity. Theoretical yield is a stoichiometric bound, not a promise about a laboratory experiment.