Chemical Equation Balancer
Automatically balance any chemical equation — enter reactants and products, get the balanced stoichiometry with element-by-element audit
Enter a chemical equation
Use ->, =, →, or <-> for reversible. Coefficients will be added automatically.
Examples:
Balanced equation
Element audit
Verifies each element count matches on both sides
| Element | Reactants | Products | ✓ |
|---|---|---|---|
| C | 3 | 3 | ✓ |
| H | 8 | 8 | ✓ |
| O | 10 | 10 | ✓ |
How it works
The equation is converted into a linear system where each element's count must be equal on both sides. The algorithm finds the smallest positive-integer solution using exact rational arithmetic (BigInt) with Gaussian elimination — no floating-point errors. Supports parentheses, brackets, hydrates (·), and complex formulas like [Cu(NH3)4]SO4.
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