Molecular Weight Calculator
Calculate molecular weight and molar mass from chemical formulas. See elemental composition breakdown.
38.6Kuses
7.7/10(222)
Molecular Weight
18.015
g/mol
Element
Count
Weight
%
H
2
2.016
11.2%
O
1
15.999
88.8%
How to Use
- Enter a chemical formula using standard notation.
- View the molecular weight and composition breakdown.
- Supports 44 common elements.
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Disclaimer: This tool is provided as-is for informational and educational purposes only.