The dram is a unit of mass in the avoirdupois system, and both a unit of mass and a unit of volume in the apothecaries' system. It was originally both a coin and a weight in ancient Greece. The unit of volume is more correctly called a fluid dram, fluid drachm, fluidram or fluidrachm.
How much is a dram of liquid?
Unit of volume
The fluid dram (or fluid drachm in British spelling) is defined as 1⁄8 of a fluid ounce, and is exactly equal to: 3.6966911953125 ml in the US customary system.
What is a dram in weight?
Dram, unit of weight in the apothecaries' and avoirdupois systems. ... The avoirdupois dram contains 27.344 grains (1.772 grams) and is equal to one-sixteenth avoirdupois ounce of 437 1/2 grains. The term also refers to the fluid dram, a measure of capacity equal to one-eighth fluid ounce.
