Balanceador de Equações Químicas
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
Formula
a·n_A = c·n_C → equação balanceada
About this calculator
This calculator checks if a chemical equation is balanced for reactions of the type aA + bB → cC + dD. You enter the stoichiometric coefficients (a, b, c, d) and the number of atoms of each element in the reactants and products. The tool verifies if the quantity of each element is equal on both sides, indicating whether the equation is correct.
How it works: for each element present, multiply the coefficient by the number of atoms in the compound. For example, if A is H2O and a = 2, you get 4 H atoms and 2 O atoms. The same is done for the products. If all elements have equal counts, the equation is balanced. Otherwise, the calculator points out the differences.
Use this tool to quickly check chemistry exercises, prepare lessons, or review reactions before experiments. It is useful for high school and college students who need to verify if their stoichiometric calculations are correct, saving time and avoiding manual errors.
Caution: the calculator does not balance the equation automatically; it only checks the balance. Make sure to enter integer and positive coefficients. Reactions with more than two reactants or products are not supported in this simple model. For complex reactions, use specialized software.
Frequently asked questions
What does a balanced equation mean?
It means the number of atoms of each element is equal on both sides, respecting the Law of Conservation of Mass.
Can I use fractional coefficients?
No, the calculator accepts only integers. In chemistry, coefficients are usually integers to represent whole molecules.
What if I have more than two reactants or products?
This version supports only two on each side. For reactions with more components, you need a more advanced tool.
Does the calculator show how to adjust coefficients if unbalanced?
No, it only indicates whether it is balanced or not and shows the differences. You must adjust the coefficients yourself.
What if the equation has ions?
The calculator considers only neutral atoms. For ions, you should enter the number of atoms of each element, ignoring charges.