Theoretical Yield Calculator
Calculate theoretical yield from reactant mass, molar masses, and stoichiometric ratio. Find the maximum possible product.
THEORETICAL YIELD
24.4291 g
MOLES REACTANT
0.5551
MOLES PRODUCT
0.5551
FORMULA
yield = (m/M) Γ ratio Γ M_prod
π‘ How to Calculate Theoretical Yield
What Is Theoretical Yield?
Theoretical yield is the maximum amount of product that could theoretically be produced from a given amount of reactant, assuming the reaction goes to completion with no losses. It is calculated using the balanced chemical equation and stoichiometric ratios.
In practice, the actual yield is always less than the theoretical yield. The ratio of actual to theoretical yield gives the percent yield, which measures how efficient the reaction was.
How to Calculate Theoretical Yield
Step-by-Step Method
Step 2: Apply stoichiometric ratio from balanced equation
Step 3: Convert moles of product to mass: theoretical yield = n_product Γ M_product
Worked Example
For the reaction 2Hβ + Oβ β 2HβO, starting with 10 g of Hβ:
Step 1: n(Hβ) = 10 / 2.016 = 4.96 mol
Step 2: Ratio is 2:2 (1:1), so n(HβO) = 4.96 mol
Step 3: Theoretical yield = 4.96 Γ 18.015 = 89.4 g HβO
If the actual yield was 80 g, the percent yield would be (80/89.4) Γ 100 = 89.5%. You can use our grams to moles calculator and molar mass calculator for the individual conversion steps.