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Chemical Formula Molecular Weight Calculator
x402
Chemical Formula Molecular Weight Calculator is a paid API for AI agents from x402.forgemesh.io, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-13).
Parses a chemical formula (including parentheses and hydrate notation) and returns total molar mass, per-element atom counts, and mass contributions for each element.
Price / call$0.003
Success—
StatusUnknown
How this service works
Molecular weight calculator for chemical formulas: parses parentheses and hydrate notation to return total molar mass, atom counts, and the mass contribution of each element. For chemistry coursework, reagent prep, and formulation agents needing an exact figure instead of an estimated one.
Output
Returns total molar mass in g/mol, atom counts per element, and the mass fraction/contribution of each element present in the formula. Handles nested parentheses and hydrate notation precisely.
Example use cases
Example prompt
“What's the exact molar mass of copper sulfate pentahydrate (CuSO4·5H2O)? I need the total molecular weight, atom counts, and the mass contribution of each element.”
Technical details
Endpoint
POSThttps://x402.forgemesh.io/chemical-formula-weightWhen to prefer
Use this endpoint when you need an exact, computed molar mass with full element breakdown rather than a lookup or estimate — especially when the formula contains parentheses, nested groups, or hydrate notation (e.g. CuSO4·5H2O, Ca3(PO4)2). Ideal for chemistry coursework, reagent preparation calculations, and formulation workflows where precision matters.
Side effects
- Invalid or unparseable chemical formula string returns an error
- Unknown element symbols in the formula cause a parse failure
- Malformed parentheses or unbalanced notation may result in error
- Empty formula field returns a validation error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| formula | string | chemical formula e.g. C6H12O6 |
Output
Schema · Response
{
"type": "json",
"example": {
"atom_count": 3,
"composition": [
{
"count": 2,
"element": "H",
"mass_percent": 11.19
},
{
"count": 1,
"element": "O",
"mass_percent": 88.81
}
],
"molar_mass_g_per_mol": 18.015
}
}Tags
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