The Redox Reaction Calculator helps balance oxidation-reduction (redox) reactions by equalizing electron transfer between oxidized and reduced species. It uses the ion–electron method and provides balanced equations in both acidic and basic mediums. By entering an unbalanced redox equation, the calculator determines the proper coefficients to ensure that the total number of atoms and charges are conserved. This tool is especially useful for chemistry students and professionals to quickly check and understand redox balancing principles in electrochemistry and reaction stoichiometry.