Exact algebra · molar masses
⚗️ Equation Balancer
Type an equation like “Fe + O2 → Fe2O3” and get the balanced coefficients instantly — solved exactly with rational arithmetic — plus molar masses and a gram-to-gram stoichiometry helper.
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Stoichiometry — enter the mass of ONE species
The balancer builds an element-count matrix and solves its null space with exact rational arithmetic (BigInt) — then scales to the smallest integers. Supports parentheses like Ca(OH)2. Equations that mix two independent reactions cannot be balanced uniquely and are reported as such. Molar masses use IUPAC 2021 atomic weights.