What is 1dram?

A dram is a unit of mass and volume commonly used in the pharmacy and jewelry industry. It is equivalent to 3.697 milliliters or 0.125 fluid ounces and weighs about 3.89 grams. In the past, it was also used as a unit of liquid measurement and was equivalent to one eighth of a fluid ounce or about 3.55 milliliters. The term dram is derived from the Greek word "drachma" which was a unit of weight used in ancient Greece. Today, the term dram is mostly used in the United States.