Molar Mass Calculator
Enter any molecular formula to instantly compute the molar mass in g/mol, with a breakdown per element. Supports parentheses groups such as Ca(OH)₂ and organic formulas like C₆H₁₂O₆.
100% client-side · no upload
Molar mass
| Element | Count | Atomic weight | Contribution |
|---|
How to use
- Type the molecular formula using element symbols and subscript numbers — for example
H2O,NaCl, orC6H12O6. - Use parentheses for groups followed by a multiplier:
Ca(OH)2,Al2(SO4)3. - Click Calculate Molar Mass to see the total in g/mol and the per-element breakdown.
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常见问题
- Is the molar mass calculator free?
- Yes, completely free with no signup required.
- Does my data leave my device?
- No. All calculations run in JavaScript in your browser and nothing is sent to a server.
- Does it work on mobile?
- Yes. The calculator works on iPhone Safari and Android Chrome.