Molar Mass Calculator
Molecular weight from any chemical formula
Molar mass
—
g/mol
Element breakdown
📚 Learn more — how it works, FAQ & guide Click to expand
Learn more — how it works, FAQ & guide
Click to expand
Molar mass calculator
Calculate molecular weight from any chemical formula.
How to use this tool
- 1
Type formula
Like H2O, NaCl, C6H12O6, or Ca(OH)2.
- 2
See breakdown
Each element with its contribution to molar mass.
- 3
Grams/mole output
Molar mass in g/mol — ready for stoichiometry.
Frequently Asked Questions
Formula syntax
Element symbols (e.g. Na, Cl). Numbers after = count (H2 = two H). Parentheses group atoms: Ca(OH)2 = 1 Ca, 2 O, 2 H.
Hydrates
Use · or * to join: CuSO4·5H2O. We parse the water as a separate unit multiplied by 5.
You might also like
🔒
100% Privacy. This tool runs entirely in your browser. Your data is never uploaded to any server.