Molecular weight calculator
Enter a molecular formula such as CaCl2·2H2O and press Enter, or click calculate.
Use regular numbers for subscripts. Do not include ion valences or isotope weights.
Spaces and bonds are ignored.
Functional groups may be enclosed in parentheses: (CH3)3CH
or brackets: [ClO2][ClO4]
Press Alt + period to enter a raised dot: CaCl2·2H2O
Groups that begin with numerals must be delimited by dots: 3BeO·Al2O3·6SiO2
Use decimals for non-integer molecules of crystallization: K2CO3·1.5H2O
or non-stoichiometric compounds: Fe 0.95O
Output includes the molecular weight, and the element weights and proportions in Hill system order.
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