Molecular mass calculator
Molar mass (g/mol) from a molecular formula (parentheses and subscripts supported).
Calculator
How to use
Molecular mass
We sum atomic weight × subscript for each element in your formula.
- Supports nested groups such as (NH₄)₂SO₄.
When to use
- Stoichiometry and moles ↔ mass for compounds.
- Checking textbook M values.
Educational use only. Double-check values for labs, homework, and exams.