About this tool
Calculate the molar mass of a chemical formula and its element-by-element composition.
Each element’s standard atomic weight (IUPAC) is multiplied by its count. Parentheses and hydrates such as Ca(OH)2 or CuSO4·5H2O are expanded.
Formula: M = Σ nᵢ·Aᵢ
Example: Chemical formula = C6H12O6 → Molar mass (g/mol) = 180.156, Atoms in the formula = 24.
Element symbols are case-sensitive: Co is cobalt, CO is carbon monoxide.
Quick steps
- Enter your values — every field shows its unit.
- Press Calculate (or Try an example to see how it works).
- Read the results and copy them if you need them elsewhere.
The calculation runs in your browser. Nothing you type is sent to 1CLIK.
FAQ
How does the Molecular Weight Calculator work?
Each element’s standard atomic weight (IUPAC) is multiplied by its count. Parentheses and hydrates such as Ca(OH)2 or CuSO4·5H2O are expanded.
What should I keep in mind?
Element symbols are case-sensitive: Co is cobalt, CO is carbon monoxide.
Is my data sent anywhere?
No. The numbers stay on your device; the page only shows the result.