As of Version 9.0, unit functionality is built into the Wolfram Language »
Details and Options
- To use AMU, you first need to load the Units Package using Needs["Units`"].
- AMU is an abbreviation for AtomicMassUnit.
- AMU is equivalent to approximately 1.66054*^-27 Kilogram (SI units).
- Convert[n AMU,newunits] converts n AMU to a form involving units newunits.