gram per mole
Molar massexact by definition
The gram per mole is the working unit of molar mass, and it is arranged so that a substance's molar mass in g/mol is numerically the same as its relative molecular mass read off the periodic table. Water is 18.015 g/mol, sodium chloride 58.44, calcium carbonate 100.09. The conversion to kg/mol is exactly 0.001, a decimal prefix.
Watch out: Since the 2019 redefinition of the mole, the equality between atomic mass units and grams per mole is no longer exact by definition. The molar mass constant is now a measured 0.99999999965 g/mol, with an uncertainty in the tenth decimal place. This changes nothing in practice and matters only in metrology.
| 1 | 1 |
One gram per mole in every molar mass unit
| 1 | gram per mole (g/mol)this unit | |
| 1 | kilogram per kilomole (kg/kmol) | |
| 1 | milligram per millimole (mg/mmol) | |
| 1 | pound per pound-mole (lb/lb-mol) | |
| 1 | dalton (as molar mass) (Da) | |
| 0.001 | kilogram per mole (kg/mol) | |
| 0.001 | kilodalton (as molar mass) (kDa) |
Solvers that use molar mass