Periodic Table/Molar Mass Calculator

Molar Mass Calculator

Enter a chemical formula to calculate its molar mass and elemental composition.

Molar Mass

18.0150

g/mol

3 atoms per formula unit

Elemental Composition

H1
Hydrogen × 22.0160 g/mol
11.19%
O8
Oxygen × 115.9990 g/mol
88.81%

All 118 elements · Supports parentheses, e.g. Ca(OH)2, Al2(SO4)3 · Atomic weights from IUPAC 2021