Molecular Weight Calculator

Calculate molar mass.

Chemical Formula (e.g. H2O, C6H12O6, NaCl)

Case Sensitive (e.g. CO vs Co). Supports basic elements.

How to use Molecular Weight Calculator

Formula: Type the chemical string (case sensitive for elements like Na vs N).
Result: See the total Molar Mass in g/mol and the elemental composition %.

The Molecular Weight Calculator (or Molar Mass Calculator) computes the total mass of a chemical formula from the periodic table.

Simply type in a formula like H2SO4 or C6H12O6, and it sums the atomic weights of all constituent atoms.