How many Grams in an Ounce of Gold?

Understanding the relationship between grams and ounces is essential when buying or selling gold, as different markets and dealers may quote prices in different units. When buying gold knowing exactly how many grams are in an ounce helps you calculate the true value of your purchase and compare prices accurately.

1 Troy Ounce = 31.1035 Grams

The troy ounce is the standard measurement used throughout the precious metals industry worldwide. It's important to note that a troy ounce is different from the standard avoirdupois ounce used for everyday items. A standard ounce equals only 28.35 grams, making the troy ounce approximately 10% heavier. When BullionByPost displays the gold price per ounce on our website, we're always referring to troy ounces (approximately 31.1035 grams).

Converting Troy Ounces to Grams

To convert troy ounces into grams, multiply the number of troy ounces by 31.1035. For example, a 1 troy ounce gold coin contains approximately 31.1035 grams of gold . This conversion is essential for investors who wish to understand the exact weight of their gold holdings in grams.

Fractional Gold Coins in Ounces to Grams

Gold coins typically come in weights measured in troy ounces. Often the 1oz gold coin is regarded as the full size version, with fractional sizes such as 1/2, 1/4 etc, corresponding to their fractional weight in ounces. The weight shown in ounces is not necessarily the total weight of the coin, but rather the weight of the pure gold content within the coin. For example, a 22 carat gold coin such as the 1oz Gold Krugerrand contains one troy ounce of pure gold (31.1g), but the coin itself weighs more than one troy ounce (in this example 33.9g) due to the alloy metals used to make it durable. Here are some common fractional gold coin sizes and their equivalent gold weights in grams:

Buying Gold by Weight at BullionByPost

At BullionByPost, we clearly display the weight of every product in both grams and troy ounces where applicable. Each product shows its total weight and exact gold content to help you make informed purchasing decisions. Our gold bars are available in various sizes denomiated in both grams and troy ounces, whilst our gold coins are typically denominated in troy ounces or fractions thereof.

All products benefit from transparent pricing based on the live gold spot price, free fully insured delivery, and clear specifications showing exact gold content. Whether you're buying a 1 ounce bar or a 12.5 kilogram ingot, you'll know precisely how much gold you're receiving.