Put the values of volume, density, atomic mass, and no. of atoms in Avogadro’s number calculator to calculate no. of units in one mole of a substance.

Avogadro number calculator computes how many units of something are present in one mole of that substance.

It uses the basic formula to calculate the result. The equation includes volume, density, atomic mass of the substance, and atomic number (Z).

## What is Avogadro’s number?

Avogadro’s number is defined as the number of elementary particles (molecules, atoms, compounds, etc.) per mole of a substance.

Its value is *6.0221023* units in each mole. Its symbol is *N*_{A.}

- One mole of water has Avogadro’s number of molecules.
- One mole of atomic oxygen has 6.022 1023 oxygen atoms.
- One mole of CO
_{2} contains Avogadro’s number of carbon atoms.

## Avogadro number unit

Avogadro number is a fixed amount of unit in a mole. The unit of Avogadro’s number can be found through the following formula:

*No. of atoms = Avogadro’s number × moles*

*Avogadro’s number **=no. of atoms/moles*

As the number of atoms has no unit:

*Unit of Avogadro’s number** **= **1/mol* *= **mol*^{-1}