Chemical Equation Balancer: Your Free Online Stoichiometry Tool

Balance Your Chemical Equation Instantly

Use '->' for the arrow and standard element symbols (e.g., H, O, Fe).

Unlock the secrets of stoichiometry with our easy-to-use Chemical Equation Balancer. Quickly balance complex chemical reactions, ensuring the conservation of mass is maintained. Simply input your unbalanced equation and get instant, accurate results for reactants and products. Simplify your chemistry tasks today!

Formula:

Balancing a chemical equation means ensuring that the number of atoms for each element is the same on both the reactant side (left) and the product side (right) of the arrow. This process adheres to the Law of Conservation of Mass, which states that matter cannot be created or destroyed in a chemical reaction.

Therefore, the total mass of the reactants must equal the total mass of the products.

For example, to balance H2 + O2 → H2O:

  • Initial Reactants: Hydrogen=2, Oxygen=2
  • Initial Products: Hydrogen=2, Oxygen=1

To balance the oxygen, we add a coefficient of 2 to H2O: H2 + O2 → 2H2O. Now hydrogen is unbalanced.

  • Current Reactants: Hydrogen=2, Oxygen=2
  • Current Products: Hydrogen=4, Oxygen=2

Finally, balancing hydrogen requires a coefficient of 2 for H2: 2H2 + O2 → 2H2O. Now all atoms are balanced on both sides!

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