AMU to Grams per Mole Converter
Common Conversions
| amu | g/mol |
|---|---|
| 1.008 | 1.008 |
| 4.003 | 4.003 |
| 12 | 12 |
| 14.007 | 14.007 |
| 15.999 | 15.999 |
| 23 | 23 |
| 35.45 | 35.45 |
| 55.845 | 55.845 |
| 63.546 | 63.546 |
| 107.87 | 107.87 |
| 196.97 | 196.97 |
Why this conversion matters in chemistry
Look at a mass spectrum: a peptide peak at 1547.74 u and the same peptide's database entry at 1547.74 g/mol carry exactly the same number. That isn't a coincidence — Avogadro's number was chosen specifically so that one mole of carbon-12 atoms (each weighing 12 u) would weigh exactly 12 grams. Every other equality between per-atom mass in amu and per-mole mass in g/mol follows from that single anchor. In practice you treat this conversion as an identity — useful mostly as a sanity check that no spurious factor of Nₐ has crept into a calculation moving between single-molecule and molar scales.
Formula
Worked Examples
Hydrogen — the lightest case, where atomic mass and molar mass write as the same number.
Carbon-12 by definition — the calibration anchor that pins both the u and g/mol scales.
Chlorine standard atomic weight — naturally occurring isotope mix, not a single nuclide.
Gold — a heavy single-isotope element that closes the textbook range cleanly.