Enter the total number of atoms and the average atomic mass into the calculator to determine the mass of the atoms.

Mass of Atoms Formula

The following formula is used to calculate the mass of atoms.

 M = a * am
  • Where M is the mass in grams
  • a is the total number of atoms
  • am is the average atomic mass (Amu’s)

To calculate the mass of atoms, multiply the number of atoms by the atomic mass.

Mass of Atoms Definition

A mass of atoms is defined as the total mass of a group of 1 or more atoms.

Mass of Atoms Example

How to calculate mass of atoms?

  1. First, determine the number of atoms.

    This can typically be calculated from the number of moles of a substance.

  2. Next, determine the average atomic mass.

    Calculate the average atomic mass using the calculator linked above.

  3. Finally, calculate the mass.

    Calculate the mass using the equation above.


What is the mass of 1 atom?

The mass of 1 atoms is determined by the number of protons and neutrons contained in the atom.