How Much Does a Bullion of Gold Weigh?
Learn about the different weights and forms of gold bullion, from institutional standards to sizes ideal for individual investors.
Gold bullion refers to gold in its bulk form, typically as bars, ingots, or coins, whose value is derived from its pure metal content rather than any collectible or numismatic rarity. These forms serve as a store of value and are traded in global markets. Understanding gold bullion weight is fundamental for investors. While there is a widely recognized standard for large-scale transactions, gold bullion is available in a variety of weights to suit different investment needs.
Standard Gold Bullion Bar Weight
The most recognized standard for large-scale gold transactions is the “Good Delivery” bar, which is the international benchmark for central banks and institutional investors. A standard Good Delivery gold bar weighs 400 troy ounces. This weight is equivalent to approximately 12.4 kilograms or about 27.4 pounds. For a bar to be designated as Good Delivery, it must meet strict purity requirements, typically at least 99.5% pure gold.
Units of Measurement for Gold
Gold, like other precious metals, is primarily measured using the troy ounce, a unit of measure distinct from the more common avoirdupois ounce used for everyday goods. A single troy ounce is equal to 31.1034768 grams.
In contrast, an avoirdupois ounce, commonly used for measuring groceries or other consumer products, weighs approximately 28.35 grams. Therefore, a troy ounce is notably heavier than an avoirdupois ounce. Metric units such as grams and kilograms are also widely used, especially in international markets, providing a universally understood scale for gold weights. One kilogram of gold is equal to approximately 32.15 troy ounces, making it a convenient unit for larger quantities.
Common Gold Bar Sizes
Beyond the institutional Good Delivery bar, a range of gold bar sizes are produced for individual investors and smaller-scale transactions. These smaller bars offer accessibility to a broader market.
Popular sizes include 1-ounce, 10-ounce, and 100-gram bars, frequently purchased by retail investors. Larger options, such as 1-kilogram gold bars, are also common for those looking to acquire a more substantial holding. Additionally, some regions utilize traditional units, like the 10-tola bar, which is prevalent in parts of Asia and weighs approximately 3.75 troy ounces. These various sizes are produced by numerous reputable mints and refineries worldwide.