What is avoirdupois weight? August 2, 2020 by Pamela Landy Avoirdupois weight is the system we use whenever we measure a grain, dram (27.3 grains), ounce (16 drams), or pound (16 ounces). Related Answers Which is older, Coca-Cola or Pepsi-Cola? How much beef does McDonald’s use each year? How much does a 1 carat diamond weigh? How was Tantalus tantalized? How many peanuts are in each box of Cracker Jack? How did 7UP get its name and who invented the drink?