How to Use This Calculator

Simply enter a valid chemical formula such as H2O, CO2, or C6H12O6 into the input box, and press the "Calculate Molecular Weight" button. The tool will return the molecular weight of the compound.

What This Calculator Is Used For

This calculator is used to determine the molecular weight (or molar mass) of a chemical compound based on its formula. It is useful in chemistry for calculations involving moles, reaction stoichiometry, and material science.

Formula

Molecular weight is the sum of the atomic weights of all atoms in the formula:

MW = Σ (atomic weight of element × number of atoms)

Example

For H2O:

• H: 2 atoms × 1.008 = 2.016
• O: 1 atom × 15.999 = 15.999

Total = 2.016 + 15.999 = 18.015 g/mol