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How many grams are in 1 ounce of gold?

The gold ounce is a familiar unit in the international market; however, not everyone knows how many grams are in one ounce of gold.

VTC NewsVTC News24/05/2026

What is an ounce of gold?

The ounce, often abbreviated as OZ, is a unit used to measure mass, weight, or volume. It originated in England in 1185 and remains widely used around the world for over 800 years.

There are five different types of ounces in the world. Among them, the ounce used for gold is the Troy Ounce – a unit of mass specifically for precious metals such as gold, silver, and platinum.

The ounce is a commonly used unit in the jewelry industry and gold trading globally. However, the ounce used for gold is not the ordinary ounce, but rather the Troy ounce – a unit of mass specifically for precious metals such as gold, silver, and platinum.

The ounce is a widely used unit of gold trading globally. (Photo: Getty)

The ounce is a widely used unit of gold trading globally. (Photo: Getty)

How many grams are in 1 ounce of gold?

Currently, world gold prices listed on international exchanges are all calculated in USD/ounce. Therefore, when monitoring gold price fluctuations, investors need to understand the conversion method to compare it with domestic gold prices.

According to international convention, 1 ounce of gold (oz) = 31.1034768 grams. In practice, it is often rounded to 31.1 grams for easier calculation.

How many taels are in 1 ounce of gold?

In Vietnam, gold is usually measured in taels and ounces (cay). Therefore, converting from ounces to Vietnamese units is essential.

1 ounce of gold = 31.1 grams

Meanwhile:

1 chỉ (unit of weight) of gold = 0.1 lượng (unit of weight) of gold = 3.75 grams

10 chỉ = 1 lượng (unit of weight) of gold = 37.5 grams.

1 ounce of gold = 8.29426 taels of gold = 0.829426 ounces of gold

Therefore, 1 ounce of gold = 0.829426 (≈ 0.83) taels of gold

Things to note when buying gold measured in ounces.

For those buying gold as jewelry or gifts, the concept of an ounce may not be very important. However, for gold investors, it is a crucial unit of measurement in international transactions.

To buy gold at a reasonable exchange rate, it's advisable to regularly update yourself on today's world gold prices as well as exchange rates in each country, because the gold market is constantly fluctuating according to supply and demand and the economic situation. Regularly monitoring prices will help you make more accurate buying and selling decisions.

Buyers should also prioritize reputable gold brands and large stores that provide complete invoices, certificates of origin, and quality inspections. This not only ensures the quality of the gold but also makes the conversion to ounces more transparent and accurate.

In addition, converting ounces to familiar units in Vietnam such as chỉ vàng (a unit of weight for gold), lượng vàng (a unit of weight for gold), or cây vàng (a unit of weight for gold bar) is also essential so that buyers can easily visualize the actual value and consider it appropriately for their investment needs.

Hoang Lan (compiled)

Source: https://vtcnews.vn/1-ounce-vang-bang-bao-nhieu-gam-ar1019692.html


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