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Molar Mass Tool


How the Calculator Works

The calculator reads each element in the formula and multiplies its atomic mass by the number of atoms present.

Molar Mass = Σ (Atomic Mass × Subscript)
  

Atomic masses come from the periodic table. Subscripts indicate how many atoms of each element are present.

Example

Formula: H₂O  
H = 1.01 × 2  
O = 16.00 × 1  

Possible Output:
Molar Mass = 18.02 g/mol