Molar Mass Calculator

Calculate molar mass from a molecular formula like H2O, NaCl, or C6H12O6

M(H2O) = H2 + O = 18.015 g/mol

Molar mass

18.015g/mol

Element breakdown

Element	Count	Atomic weight	Subtotal
H	2	1.008	2.016
O	1	15.999	15.999

About this calculator

Calculate the molar mass of any chemical compound by entering its molecular formula. Supports simple formulas (H2O, NaCl), subscripts (C6H12O6), and parentheses (Ca(OH)2, Al2(SO4)3). See a visual breakdown of each element's weight contribution.

Common examples

H2O = 18.015 g/mol (water)
NaCl = 58.443 g/mol (table salt)
C6H12O6 = 180.156 g/mol (glucose)
Ca(OH)2 = 74.093 g/mol (slaked lime)
Al2(SO4)3 = 342.132 g/mol (aluminum sulfate)