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Balancing Chemical Equations Calculator

Load Example Equation
H He
Li Be B C N O F Ne
Na Mg Al Si P S Cl Ar
K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr
Rb Sr Y Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te I Xe
Cs Ba La Hf Ta W Re Os Ir Pt Au Hg TI Pb Bi Po At Rn
Fr Ra Ac Rf Db Sg Bh Hs Mt Ds Rg cn Nh FI Mc Lv Ts Og
Lanthanide Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu
Actinide Th Pa U Np Pu Am Cm Bk Cf Es Fm Md No Lr
SPACE 1 2 3 4 5 6 7 8 9 0 + = CLR
  • Calculator just tries to balance the equation. It cannot predict products.
  • Reagents are sufficient to make an equation, e.g. H2 O2 H2O. Signs '+' or '=' are optional, however must be separated with spaces from reagents when introduced, e.g. H2 + O2 => H2O
  • One can try balance half reactions. Ions should be depicted with square or round braces like these: H[+], SO3(2-), Cu[+2].
  • Electrons e[-] must not be specified in half reactions.


Table of Content


Our balancing chemical equations calculator takes instants to balance any chemical equation. Enter any unbalanced equation in the tool and get its balanced form in seconds. 

You can use a balance equation calculator for online reaction balancing calculations or find the complete tutorial to balance chemical equation with examples.

What Is a Chemical Equation?

In chemistry:

“A chemical equation shows the overall chemical change of reactants into products. The reactants are what you start with and the products are what form.”


Consider the following equation:

$$ \text{NaOH}\;\;+\;\;\text{HCl}\;\rightarrow \text{NaCl}\;\;+\;\;H_{2}O $$

In the above equation, caustic soda and hydrochloric acid react with each other to form a couple of products which are sodium chloride and water.

How Are Chemical Equations Written?

While writing a chemical equation, the reactants are on the left before the arrow and the products are on the right. It remains the same while using a balanced equation calculator. 

The arrow (→) is there to show that the reaction is irreversible. It shows the direction of the reaction. The plus sign (+) indicates that there is more than one reactant or product on each side of the equation.

Types of Chemical Equations:

There are two types of chemical equations that can be balanced by our balancing chemical equations calculator for free. These include:

Word Equation:

In this equation, all reactants and products are represented by their full descriptive names.
$$ \text{Sodium} + \text{Chlorine}\rightarrow\text{Sodium Chloride} $$

Symbol Equation:

In a symbol equation, all parameters are represented by their periodic table symbols. 

$$ H_{2} + O\rightarrow2H_{2}O $$

For your learning regarding molecules, use our grams to molecules calculator. Or if you want to learn about the fraction of moles, we also have mole ratios calculator for your learning and practice.

How To Balance Chemical Equation?

Consider the following chemical reaction equation:

$$ \text{Fe}\;\;+\;\;O_{2}\;\;\rightarrow\;\;Fe_{2}O_{3} $$

To balance this equation manually without using a chemistry equation balancer, we need to have the same number of iron on the left-hand side as we do on the right-hand side. So on the left-hand side, it has one atom of iron and on the right-hand side, it has two atoms of iron. To make them equal, add the number of two molecules on the left-hand side as follows:

$$ \text{2Fe}\;\;+\;\;O_{2}\;\;\rightarrow\;\;Fe_{2}O_{3} $$

Now do the same with the oxygen. On the left-hand side, we have two atoms of oxygen but on the right-hand side, we have three atoms of oxygen. We need to make it equal but the balancing equations calculator automatically equals it. So, on the left-hand side apply two atoms of oxygen with one and a half molecules.

$$ \text{2Fe}\;\;+\;\;1.5O_{2}\;\;\rightarrow\;\;Fe_{2}O_{3} $$

Now we have the same exact number of iron and oxygen on the left-hand side as on the right-hand side. But we return with a problem because there is never half molecule noticed.

But we noticed here we have one and half a molecules of oxygen. We can also find the molecular weight online using molecular weight calculator. So how can we get rid of this half molecule? The answer to this question is multiply both sides by 2.

$$ 2*\text{2Fe}+2*\text{1.5O_{2}}\rightarrow 2Fe_{2}O_{3} $$

$$ \text{4Fe}+\text{3O_{2}}\rightarrow 2Fe_{2}O_{3} $$

If you prefer using our balancing chemical equations calculator here, your goal becomes quite fast and easier and it automatically gets the work done for you.

Now we have a balanced chemical equation. The chemical equation calculator works with the same formula and procedure. For learning about the half-life of an element or substance.

Related: Learn how to balance redox reaction in basic medium?

How To Use Balancing Chemical Equations Calculator?

Our chemical equation balancer thoroughly balances a chemical equation if used according to the following guide:


  • Enter the unbalanced chemical equation in the chemical balancer
  • You also have the option of loading an example equation
  • Once done, hit the Calculate icon


  • Our balance chemical equations calculator balances the equation by showing all coefficients proportions 
  • It also shows all molecules, atoms, and particles that constitute a chemical reaction


What Are The Main Types of Chemical Equations?

Every chemist has to deal with certain chemical schemes that involve the following:

  • Precipitation reaction
  • Combination reaction 
  • Combustion reaction 
  • Decomposition reaction 
  • Neutralization reaction 
  • Single and double replacement reaction
  • Synthesis reaction

Whatever the reaction scheme you are treating with, our best balancing chemical equations calculator will certainly assist you in calculating reactants and product balancing ratios. 

What Happens If Chemical Equation Is Not Balanced?

If a chemical reaction is not balanced, you can never get any information about the reactants or products involved in it. But using our balancing chemical equations solver will resolve this issue by equalizing the amount on both sides. This will let you know what proportion did every reactant invested to make the final product.

What Are The Three Limitations of a Balanced Chemical Equation?

A balanced chemical equation:

  • Never informs about the physical state of the chemical reaction 
  • Never tells the exact concentration and dilution amounts of reactants and products 
  • Never tells if a chemical reaction is reversible or irreversible


From the source Wikipedia: Balance equation, Chemical equation, Reaction types, Catalysis and other conditions, Ionic equations

From the source Lumen Learning: Writing and Balancing Chemical Equations, Balancing Equations, Ionic Reactions

Submit Your Review

Average user rating

4.8 / 5

overall helpful, i just wished it went more into detail with the answers. thanks for saving my chem grade
very helpful calculator.
Your sleep paralysis demon
Thanks... now I can give my host the answers, let's say, in a DrEaM!????
y'all need to add more known problems because when I add mines sometimes it does not help anyways i like this chemical equation balancer
Kristin Okeefe
make this calculator more visible
this website really helped
Please I am finding it difficult to solve the following . Please could you help me solve, balance and send to my mail? (CH3CO2)3Sb + SeO2 = ?
Your Mom
This was very useful for my Honors Chem class and my friend Arush doesn't know about this
Really helpful information and excellent organization.
thank you for this helpful tool page, it really save my time to do my homework.
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tati carlo