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.
How much is a Drachm?
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 bigger than a dram?
A scruple is a small amount of something, and is used in the system of apothecaries' weight used by pharmacists. In this system, the smallest unit is the grain, and a scruple is equivalent to 20 grains. As weights increase, a dram is 3 scruples, an ounce is 8 drams, and a pound is 12 ounces.
