Stoichiometry Calculator
Convert between moles of reactants and products using stoichiometric ratios.
Enter known moles and coefficients for Species A. Enter coefficient for Species B to find its moles.
How It Works
Enter the molar amounts and stoichiometric coefficients for two species in a balanced reaction. The calculator uses the mole ratio to find how many moles of species B are produced or consumed per moles of species A.
Formula
Examples
2H2 + O2 → 2H2O: 4 mol H2 → 2 mol O2 and 4 mol H2O | N2 + 3H2 → 2NH3: 1 mol N2 → 3 mol H2
Frequently Asked Questions
What is stoichiometry?
Stoichiometry is the calculation of reactants and products in chemical reactions using balanced equations. It relies on the law of conservation of mass and mole ratios from coefficients.
How do you use stoichiometry?
Convert known quantities to moles, use the mole ratio from the balanced equation, then convert back to desired units.
Why do we need a balanced equation?
Coefficients in a balanced equation give the exact mole ratios in which substances react and are produced, so stoichiometric calculations depend on balanced equations.