Molecular weight calculator for bench formulas.
Enter a chemical formula to calculate molar mass, atom counts, and element-by-element mass contribution. Supports common formulas, parentheses, and hydrate dot notation.
Formula input
Formatting tips
- Use normal element capitalization:
NaCl, notnacl. - Hydrates can use a dot:
CaCl2·2H2OorCuSO4.5H2O. - Parentheses are supported:
Ca(OH)2.
Molecular weight
58.44g/mol
NaCl = 2 total atoms per formula unit
Element breakdown
11×1
Na
Sodium
22.99
% mass39.34%
22.99 g/mol
17×1
Cl
Chlorine
35.45
% mass60.66%
35.45 g/mol
Alkali metalHalogen