Oxidation Number Calculator

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Asma Rahil

Asma Rahil

Last Updated February 08 - 2023

Chemist by Profession and Researcher.

Introduction to Oxidation Number Calculator

The oxidation number calculator with steps belongs to the group of chemical calculators, which is used exclusively to find the oxidation number of all the elements present in a chemical compound.

This oxidation states calculator can help you to calculate the chemical fractions faster and displays the oxidation state of any element in any chemical compound in just a few seconds.

Related: You can also use half reaction calculator and percent composition calculator with solution to calculate percent composition and redox reaction easily.

What is the oxidation number in chemistry?

In chemistry, we assign each atom a specific number based on the number of electrons it loses or gains during the formation of the compound. Thus, the oxidation number or state keeps the record of electrons gained or lost by an atom.

The atom that gains electrons develops a negative charge and vice versa; the oxidation number could also be negative, positive, and zero as either it loses or gains electrons or stays intact.

During a chemical reaction, we analyze the oxidation state of each element and the corresponding changes in their oxidation states to track the overall electron transfer. Don't forget that the oxidation state doesn't represent the actual charge over the entire molecule. Instead, it only covers the charge over a single atom in the substance.

Related: As we know, percent yield and theoretical yield can be difficult to calculate. You can use yield calculator chemistry or theoretical yield of chemical reactions calculator to calculate percent yield and the theoretical yield easily.

To calculate the number of electrons an atom accepts or donates during a reaction, you can use this oxidation number calculator rather than immersing yourself in complex rules and evaluations.

How to find oxidation number equation calculator?

It is simple and easy to find oxidation number finder. You can directly access this tool on our website or from search engine. For finding this tool from search engine, type oxidation formula calculator and pick this tool from search engine results.

Or search for equation balancer website and use oxidation number generator directly from here.

How to use an oxidation state calculator?

To use the oxidation number calculator with steps, you only have to follow a few basic steps.

  • Write the chemical formula of the compound accurately. While writing the chemical formula, pay special attention to capital and small letters. The oxidation state finder will not detect the substance if you write CAOH2 rather than CaOH.
  • Write the correct number of atoms of each element present in the compound. Remember, if you skip or mistakenly add more atoms of an element, the entire nature of your substance will change. Eventually, the oxidation number of each reacting element will be altered. To confirm the correct number of atoms in the compound, you can use our equation balancer.
  • Avoid unnecessary brackets [] or parenthesis () while writing chemical formulas.
  • After inserting the formula, click on balance or calculate button and wait a few seconds.


The result of your query regarding the oxidation number or state of all the elements in a compound will be shown in four major sections.

  1. Input interpretation that will state the general or chemical name of your substance.
  2. The overall result comprises the complete lewis diagram showing bonding between every element and a thorough representation of electron transfer.
  3. Chemical names and formulas that will embody the hill formula, chemical formula, and general name of the substance.
  4. Ion equivalent section that will show the number of anions and cations in the complete compound.

How does the oxidation calculator work?

Our oxidation number calculator is based on the Lewis diagram method to calculate an element's oxidation number in a compound. For this purpose, the steps taken by the tool to derive final results are as follows.

Related: You can also use a protons neutrons and electrons calculator to calculate the atomic mass of elements easily.

  1. Firstly, the oxidation numbers calculator draws the complete Lewis diagram showing interacting atoms and valence electrons.
  2. Secondly, it is estimated which atom is gaining or donating the electron in the compound. It is done by keeping the general rule in front; electrons draw towards more electronegative atoms and bond pairs. On the other hand, the electrons are divided equally among homonuclear bonds.
  3. Based on this bonding and the total count of atoms of each element, the final result is concluded.

Why should you use our oxidation number method calculator?

This oxidation number solver saves you from manual calculations, and you can find the oxidation number in the simplest to most complex compounds in a few instants.

Change in oxidation number calculator shows a complete stepwise method of deriving the oxidation state. You will go through all the bonding parameters and atomic interactions to understand how oxidation numbers of each atom in a complex get changed after the reaction.

  1. Finding the oxidation number of an atom, especially when it is a part of a chemical compound, is quite a tricky thing. To avoid making mistakes, you have to pay attention to bonding attributes, ionic approximations, and atomic count.
  2. Mostly the online oxidation number calculator with solution present on the web offers to count the oxidation state of atoms in the free state. If any of those allow you to calculate oxidation numbers in complexes, you will be subjected to some digits.

We hope oxidation number finder will be helpful for you. This website also offer other online tools such as chemical molecular weight calculator and acid base molarity calculator for free to complete your needs.

Frequently Asked Questions

What is the oxidation number of carbon?

The oxidation number of carbon is usually +4 in compounds such as CO2, +2 in C2O4^2-, and -4 in CH4. It can vary based on the compound and the oxidation state of the element it is bonded with.

What is the oxidation number of nitrogen?

The oxidation number of nitrogen in a neutral compound is +5 or -3, and in a polyatomic ion it varies based on the chemical formula.

What is the oxidation number of sulphur?

The oxidation number of sulfur in a neutral compound is -2, +4, or +6. In a polyatomic ion, the oxidation number of sulfur varies depending on the chemical formula.

What is the oxidation number of oxygen?

The oxidation number of oxygen is usually -2, except in peroxides where it's -1 and in compounds with fluorine where it can be +2.

What is the oxidation number of aluminum?

The oxidation number of aluminum is +3 in its most common state, but it can also be +1 or +2 in some compounds.

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