What is a Troy Ounce?


A troy ounce is a weighting unit for precious metals that has been used since the Middle Ages. One troy ounce weighs 31.1034768 grammes and was first used in Troyes, France, according to the U.K. Royal Mint. A standard ounce weighs slightly less, 28.35 grammes, and is used to measure things like sugar and grain. To ensure that purity requirements and other common measurements endure across time, the troy ounce is still used as the standard unit of measurement in the precious metals market. The troy ounce is frequently denoted by the abbreviations “t oz” or “oz t.”

Troy ounce: History 

The term “troy ounce” is believed to come from a unit of measurement first used in Troyes, France, in the Middle Ages, created for use by traveling merchants as a standard measurement of exchange. The troy measurement system includes the grain, the pennyweight, the troy ounce, and the troy pound. During the 15th and 16th centuries, France and England made the troy ounce their standard for measuring gold and silver. In 1828, the United States followed suit. The troy ounce is now the international standard in most countries for measuring gold, precious metals, and gems.

The avoirdupois ounce, another name for the imperial ounce, is based on a 16-ounce pound. In order to measure grain and textiles, England adopted the avoirdupois ounce in the fourteenth century. When England initially colonised America, the colonies kept using the avoirdupois/imperial system of measurement. The imperial system of ounces was replaced by the stone system, with one stone (st) equivalent to 14 imperial pounds, by legislation established in the United Kingdom in 1824.

Difference between an Ounce and a Troy Ounce: 

A troy ounce has 2.75 grammes more weight than a standard ounce. It would be roughly 10% heavier than the normal unit of measure if you put it on a conventional scale. A troy ounce weighs 31.1 grammes, while a standard ounce weighs exactly 28.35 grammes. The troy ounce weighs 32.1507 kilogrammes.

Use of Troy Ounce: 

The majority of nations in the world measure weights in grammes and kilogrammes. Only in the US is the avoirdupois system still in use. It is used as the fundamental unit of measurement for all weights, with the exception of gold, precious metals, and diamonds, and is the standard of measuring for items like grain, textiles, and other dry products. 

The troy ounce is the only unit of its measurement system that is still widely used today, which distinguishes it from other contemporary measurement systems. It is used exclusively as a standard measurement for gold, silver, and other precious metals around the world.

Compared to an ounce, is a Troy ounce heavier or lighter?

In comparison to a regular U.S. (avoirdupois) ounce, a troy ounce weighs more. A troy ounce weighs approximately 1.097 ounces avoirdupois, or 9.7% more.

A Troy ounce of gold is worth how much?

A troy ounce does not alter in weight over time. There isn’t a fixed price for a troy ounce of gold, though, because the cost of gold fluctuates. One troy ounce of gold might cost more or less on any given day depending on a variety of market factors and/or circumstances. One troy ounce of gold cost roughly $20 in 1923, for instance. Gold’s all-time high price for a troy ounce was $2,072.49 in August 2020. Due to the fact that troy and imperial ounces share the same acronym, the spot gold price is still displayed as $2,072.49/oz. The term “ounce” is generally understood to refer to a troy ounce in the gold bullion market.

Importance of Troy Ounce: 

International trade exists in precious metals, including gold. There are numerous sectors in the precious metals industry, including trade, production, and discovery. A common unit of weight for gold and other precious metals is necessary in order to ensure consistency across all industries and national boundaries. 

The historical costs of gold and other precious metals have a role in this constancy. The troy ounce has been used historically, therefore keeping it in use aids in maintaining industry continuity and long-term pricing tracking. It is crucial to keep in mind that precious metals such as gold and jewels are weighed in troy ounces when buying them., an authorized and trusted Royal Canadian Mint Dealer that offers 100% insured gold bullion with highest purity level. It provides an array of choices for gold investors and a promising high quality service to it’s clients.