Originally Posted by Unregistered
I didn't find a volume conversion for scruples. Could you provide one?
According to Rowlett, it is a unit of weight in the apothecary and troy weight systems. It is 20 grains or 1/24 of a troy ounce (480 grains). With that, you can convert to other units. The scruple does not appear to be used in any system of volume (but drams and ounces can be either weight or volume measures).
As both US and UK pharmaceutical industries are mostly metric, the scruple is basically obsolete. I don't think you'll find any modern usage.