The Limiting Reactant Calculator helps you easily identify which reactant in a chemical reaction is used up first, preventing further product formation. By entering the mass, molar mass, and mole ratios of two reactants, this calculator determines the limiting reagent, the amount of product formed, and the theoretical yield. It’s a fast and accurate tool for chemistry students, teachers, and lab professionals who want to simplify stoichiometry calculations. Understanding the limiting reactant is essential for balancing equations, maximizing reaction efficiency, and predicting product quantities in real-world chemical reactions. Use this simple calculator to save time and avoid manual errors in your chemistry experiments.