A unit of mass or volume derived from the Latin “uncia” (one-twelfth). Two common types in the U.S.: avoirdupois ounce (1 oz ≈ 28.35 g) for food and parcels, and fluid ounce (1 fl oz ≈ 29.57 mL) for beverage volume. Primarily used in daily life in the U.S. and U.K. Not used in China, but ounce values frequently appear on labels of imported goods such as infant formula or alcoholic beverages.

A unit of mass or volume derived from the Latin “uncia” (one-twelfth). Two common types in the U.S.: avoirdupois ounce (1 oz ≈ 28.35 g) for food and parcels, and fluid ounce (1 fl oz ≈ 29.57 mL) for beverage volume. Primarily used in daily life in the U.S. and U.K. Not used in China, but ounce values frequently appear on labels of imported goods such as infant formula or alcoholic beverages.