Answer by
drylongsoba (32)
A pennyweight, or dwt, is a common unit of measure for the mass of precious metals such as those used in jewelry and dental crowns and inlays. It is equivalent to 1. 5517 grams, 24 grains, one twentieth of a Troy ounce, one two hundred fortieth of a Troy pound, or approximately 0. 055 ounces.