Convert from carat [pre-1913 US] to carat [UK]

Unit Definition (carat [pre-1913 US])

Unit Definition (carat [UK])
The carat [UK] is a unit of mass used for diamonds and other precious stones. In the U. S. and Britian, the diamond carat was formerly defined by law to be 3.2 troy grains, which is about 207 milligrams.