Molecular Weight Calculator

Created by Łucja Zaborowska, MD, PhD candidate
Reviewed by Bogna Szyk and Jack Bowater
Last updated: May 17, 2022
This molecular weight calculator finds the molecular weight of organic compounds based on their empirical formula. The atomic molecular weights are used according to their naturally-occurring isotope ratios, so this calc is not suitable for accurate mass determination in mass spectrometry.
Łucja Zaborowska, MD, PhD candidate
1st Element
Hydrogen (H)
No. of atoms
2nd Element
No. of atoms
Your molecule:
Molecular weight: 1 u.
Chemical formula: H
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