Science
Molecular Weight Calculator
Find molecular weight from any chemical formula.
⚗️
Molecular Weight Calculator
For moles ↔ grams conversion
Results
Formula & Methodology
Molecular Weight = Sum of (atomic mass × count) for all elements
Example: H₂O
= 2(1.008) + 1(15.999)
= 2.016 + 15.999
= 18.015 g/mol
Moles to Grams: mass = moles × MW
Grams to Moles: moles = mass / MW
Example: H₂O
= 2(1.008) + 1(15.999)
= 2.016 + 15.999
= 18.015 g/mol
Moles to Grams: mass = moles × MW
Grams to Moles: moles = mass / MW
About Molecular Weight Calculator
Our molecular weight calculator computes the molecular weight (molar mass) of any chemical compound from its formula, and provides a breakdown by element.
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