Calculates the molecular weight (also known as molar mass) of a chemical compound based on the sum of the atomic weights of each element in the molecular formula.
Start with your values, or try a preset.
Enter Element 1 Symbol, Element 1 Count, Element 2 Symbol, Element 2 Count, Element 3 Symbol, and Element 3 Count in the units shown.
Read Element 3 Atomic Weight, Element 2 Atomic Weight, Element 1 Atomic Weight, and Molecular Weight in the results panel. Results update as you change the inputs.
Choose a preset to load an example, then adjust the values for your situation.
See the inputs and their calculated results.
Element 1 Symbol: H; Element 1 Count: 2; Element 2 Symbol: O; Element 2 Count: 1; Element 3 Symbol: H; Element 3 Count: 0
Element 3 Atomic Weight: 1.008; Element 2 Atomic Weight: 15.999; Element 1 Atomic Weight: 1.008; Molecular Weight: 18.015 g/mol
Element 1 Symbol: C; Element 1 Count: 1; Element 2 Symbol: O; Element 2 Count: 2; Element 3 Symbol: H; Element 3 Count: 0
Element 3 Atomic Weight: 1.008; Element 2 Atomic Weight: 15.999; Element 1 Atomic Weight: 12.011; Molecular Weight: 44.009 g/mol
Element 1 Symbol: Na; Element 1 Count: 1; Element 2 Symbol: Cl; Element 2 Count: 1; Element 3 Symbol: H; Element 3 Count: 0
Element 3 Atomic Weight: 1.008; Element 2 Atomic Weight: 35.453; Element 1 Atomic Weight: 22.99; Molecular Weight: 58.443 g/mol
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