FREE · EDUCATION & SCIENCE
Chemical Equation Balancer.
Balance chemical equations, including ionic equations with charges, and check that every element and the total charge are conserved.
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How to use Chemical Equation Balancer
Type the reactants and products separated by =, -> or →. Write charges with ^ (Fe^3+, MnO4^-). The balanced equation and an atom-by-atom check appear instantly.
How it works
Element (and charge) counts form a matrix whose null space is found with exact fractions; the solution is scaled to the smallest whole-number coefficients.
Example
C3H8 + O2 = CO2 + H2O becomes C3H8 + 5O2 → 3CO2 + 4H2O; MnO4^- + Fe^2+ + H^+ is balanced with 5 Fe and 8 H⁺.
Questions about Chemical Equation Balancer
Is Chemical Equation Balancer free, and do I need an account?
Yes. This tool is free to use in your browser without an account. Processing takes place on your device.
What are the limits and what should I check?
Up to 20 species. Equations that combine several independent reactions are reported rather than balanced arbitrarily. Balancing does not say whether a reaction happens. Everything is calculated in your browser; nothing you type is uploaded. Review the result before using it in your work.
Is my input sent to a server?
Your input is processed in your browser and is not uploaded by this tool. Files and pasted text are cleared when the page is refreshed. Normal website requests are still required to load the page and its libraries. Read the privacy explanation.