Molecular Weight Calculator





If you click on the each elements, the sum of the molecular weights is output as the atomic mass is added.
For example, if you want to know the molecular weight of water (H 2O), double-click ‘H’ and then ‘O’ one-click.

Molecular Weight Calculator

Molecular weight refers to the relative mass of a molecule based on carbon-12 atoms (6 protons + 6 neutrons).
If we add the mass unit (g) after the molecular weight number, it becomes the mass value of the material corresponding to 1 mole of the molecule.

Mole – a unit that counts the number of particles

Because atoms are so small, you can not count them by counting the number of atoms and molecules. For example, 1 mm diameter raindrops contain about 1,400,000,000,000,000,000,000 water molecules.
In this case, it is easy to bundle several particles and calculate them easily in one unit. The most commonly used unit is mole.
1 mole is defined as the number of carbon-12 atoms in a mass of 12 g. This number is called Avogadro’s number and is about 6.0221415 × 10 23.

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