Chemistry
Chemical Equation Balancer
Balance any chemical equation by conserving every element, with whole-number coefficients.
Your inputs
Change any value to update the result instantly.
Balanced equation
C3H8 + 5O2 → 3CO2 + 4H2O
Coefficients
1 : 5 : 3 : 4
Elements conserved
C, H, O
Substances in the equation
4
Check
Every element has the same atom count on both sides
Coefficients are solved exactly with whole-number arithmetic and then reduced to the smallest possible set. Reaction state labels such as (s), (l), (g) and (aq) are ignored for balancing.
What this calculator does
Balances a chemical equation by solving the element-conservation system for the smallest set of whole-number coefficients.
What your result means
The balanced equation, in which every element has the same number of atoms on both sides, as required by conservation of mass.
Formula and working
For every element: atoms on the reactant side = atoms on the product side
- 1
Collect the inputs
Chemical equation = C3H8 + O2 -> CO2 + H2O
- 2
Apply the formula
For every element: atoms on the reactant side = atoms on the product side
- 3
Result
Balanced equation = C3H8 + 5O2 → 3CO2 + 4H2O
Frequently asked questions
Symbols and assumptions
- nu
- Stoichiometric coefficient of a substance
- element row
- One conservation equation per element
- • Formulas are written with standard element symbols.
- • Brackets and hydrate notation are expanded before balancing.
- • State labels such as (s), (l), (g) and (aq) do not affect balancing.
Sources and review
Reviewed 2026-09-22 · Next review 2027-09-22
- • Equations with more than one independent balanced answer are rejected rather than guessed. Charge-balanced redox half-equations are not handled.
Important limitation
This is an educational estimate based only on the values and formula shown. Verify current rates, rules, units, and professional standards before relying on the result. It is not personalized financial or investment advice.
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