Fluid ounce (oz)

Volume

0.01 gal

The fluid ounce (symbolized as fl oz or oz) is a unit of volume used in both US customary and British imperial systems. The US fluid ounce is defined as 1/128 of a US liquid gallon (about 29.57 milliliters), while the imperial fluid ounce is 1/160 of an imperial gallon (about 28.41 milliliters). Originally based on the volume occupied by one avoirdupois ounce of water, it remains widely used in consumer beverage labeling and cooking.

British imperial liquid/dry

U.S. liquid measure

U.S. dry measure

Japanese

Cooking (U.S.)

Cooking (metric)