As of version 9.0, unit functionality is built into Mathematica

is a unit of exposure to X or gamma radiation.


  • To use , you first need to load the Units Package using Needs["Units`"].
  • is equivalent to approximately 0.000258 Coulomb/Kilogram (SI units).
  • Convert[n Rontgen, newunits] converts n Rontgen to a form involving units newunits.
  • is typically abbreviated as R.
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