Enter the molecular weight, element symbol, and mass percentage into the calculator to determine the resulting molecular formula.

Molecular Formula Calculation Formula

The following formula is used to calculate the molecular formula from your given inputs. 

Element Weight = Molecular Weight * (Mass Percentage / 100)

Variables:

  • Element Weight is the weight of the element in the molecule (g/mol)
  • Molecular Weight is the total molecular weight of the compound (g/mol)
  • Mass Percentage is the percentage of the element's mass in the compound (%)

To calculate the element weight, multiply the molecular weight by the mass percentage and then convert it to the element's quantity in the formula.

What is Molecular Formula Calculation?

Molecular formula calculation refers to the process of determining the number of atoms of each element in a molecule, based on the molecular weight and the mass percentage of each element. This helps in identifying the exact composition of a chemical compound. Proper molecular formula calculation ensures accurate chemical analysis and understanding.

How to Calculate Molecular Formula?

The following steps outline how to calculate the molecular formula using the given formula:

  1. First, determine the molecular weight of the