Chemical Equation Balancer

Balance chemical equations automatically, including ionic and redox equations with charges and electrons.

How to use the Chemical Equation Balancer

Enter or select: Unbalanced equation.
The results (Balanced equation, Atom check) are calculated instantly as you type.
Use “Copy link” to share the calculation with the same input values.

Formula

Solves the linear system of atom (and charge) conservation with exact rational arithmetic

About this tool

Separate species with + and sides with = or ->. Charges use ^: Fe^3+, MnO4^-; electrons are e.

Example: MnO4^- + Fe^2+ + H^+ = Mn^2+ + Fe^3+ + H2O