Chemical Equation Balancer

Balance chemical equations instantly using our free online calculator. Get correct stoichiometric coefficients for any reaction. Supports parentheses and polyatomic ions.

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Use "=" or "->" to separate reactants and products. Elements are case sensitive.

Quick Examples
H2 + O2 -> H2O
CH4 + O2 = CO2 + H2O
Fe + O2 -> Fe2O3
H2 + N2 = NH3
AgNO3 + NaCl = AgCl + NaNO3

About Chemical Equation Balancer

Chemical Equation Balancer

Instantly balance chemical equations with our easy-to-use calculator. It identifies the correct stoichiometric coefficients for reactants and products to ensure mass conservation.

How to Use

  1. Enter an unbalanced chemical equation (e.g., H2 + O2 = H2O)
  2. Click "Balance"
  3. View the balanced equation with correct coefficients

Supported Format

  • Use "+" to separate molecules
  • Use "=" or "->" to separate reactants and products
  • Elements are case-sensitive (e.g., Cu is Copper, CU is Carbon + Uranium)
  • Parentheses are supported: Ca(OH)2

Examples

  • Combustion: CH4 + O2 = CO2 + H2O
  • Synthesis: H2 + N2 = NH3
  • Double Replacement: AgNO3 + NaCl = AgCl + NaNO3