Gold bars come in various sizes, and the weight of a gold bar is typically measured in troy ounces. The most common sizes for gold bars include 1 ounce, 10 ounces, 1 kilogram (approximately 32.1507 troy ounces), and larger bars such as 1 troy pound (12 troy ounces) or 400 troy ounces.
So, the number of ounces in a gold bar depends on its weight or size. It’s important to specify whether you are using troy ounces or avoirdupois ounces when discussing gold, as the troy ounce is the standard unit of measurement for precious metals.