About Molecular Weight Calculator & Chemical Formula Parser
High-precision chemical formula parser and molecular weight calculator. Supports nested parentheses (e.g. Ca3(PO4)2, (NH4)2SO4) and hydrated crystal salts (e.g. CuSO4·5H2O). Generates total molar mass, atom counts, and elemental mass percentage composition breakdown.
Key Capabilities & Features
- Parses parenthesized formulas (e.g. Fe2(SO4)3, Ca(OH)2)
- Handles hydrated salts with dot notation (e.g. CuSO4·5H2O, CuSO4*5H2O)
- IUPAC standard atomic weights for all 118 elements
- Elemental mass percentage breakdown table
- Total atom counter and unique element tally
How to Use Molecular Weight Calculator & Chemical Formula Parser
1
Enter Chemical Formula
Type or paste your formula (e.g. C6H12O6, H2SO4, Ca(OH)2).
2
Inspect Mass Breakdown
View the total molar mass in g/mol and the mass percentage for each element.
3
Copy Molecular Weight
Click Copy MW to transfer the exact mass to your clipboard.
Privacy & In-Browser Execution Guarantee
Chemical formulas are parsed locally in browser memory with complete privacy.
Frequently Asked Questions
How do I enter hydrated compounds?
You can use an asterisk (*), middle dot (·), or bullet (•) to denote water of crystallization, e.g., CuSO4*5H2O.
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