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Molecular Weight Calculator

Estimate molar mass from a chemical formula and common element symbols.

Common elements supported; use element symbols and subscripts as digits, e.g. C6H12O6.

Molar mass
18.015 g/mol
H2O
H × 22.016 g/mol
O × 115.999 g/mol

About the Molecular Weight Calculator

Estimate molar mass from a chemical formula and common element symbols.

It runs entirely in your browser — nothing you type is sent to a server — and the result updates as you edit the inputs. Estimates are for educational and informational purposes only; see ourdisclaimer.

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