What is an ounce?

An ounce is a unit of measurement typically used to measure the weight or mass of objects or substances. It is equivalent to 28.35 grams or 1/16 of a pound. Ounces are commonly used to measure precious metals like gold and silver, as well as drugs and herbs. In the United States, ounces are also used to measure liquid volume, where 1 fluid ounce is equivalent to approximately 30 milliliters. The abbreviation for ounce is "oz."