Formula verified · Deterministic calculation

Molecular Weight Calculator

Parse a chemical formula deterministically and sum standard atomic weights across elements, subscripts and supported nested groups.

Chemical formula

Molecular weight18.02 g/mol

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Result methodology

Deterministic formula parsing and atomic-weight summation. Molecular Weight = 18.015

How this calculator works

Formula mass is M = Σ(nᵢAᵢ), the sum of each element count multiplied by its atomic weight.

Formula

M=Σ(nᵢAᵢ)

Formula mass from element counts and standard atomic weights.

Worked example

Water is a verified test case used by the calculation engine.

Assumptions and limitations

Element symbols are case-sensitive.
Parentheses and square-bracket groups are supported.
Hydrates, charges and dot notation are not currently supported.

Methodology & sources

This calculator uses deterministic, versioned calculation logic. The formula and verified examples above are part of the calculation definition used by CalcuMint.

CalcuMint deterministic chemistry engine

Frequently asked questions

Can it parse grouped formulas?

Yes. Parentheses and square brackets can be nested.

Does it recognize every named element?

The parser includes symbols for all 118 currently named elements.