Different types of ounces

There are two primary types of ounces: the fluid ounce and the avoirdupois ounce. A fluid ounce measures volume and is commonly used for liquids; in the U.S., one fluid ounce is approximately 29.57 milliliters. The avoirdupois ounce, used for measuring weight, is equivalent to about 28.35 grams. Understanding these distinctions is essential for accurate measurements in cooking and other applications.