The same gold can be quoted per gram, per ounce, per tola or per baht. Here is how they relate.
Last reviewed: 13 November 2026
Gold has been traded for thousands of years, and each region developed its own weights. Some of those units are still in everyday use, even though the metric gram is now the standard for most shops. When you read a gold price, always check the unit first, because a price per ounce and a price per gram differ by more than thirty times.
The gram is the base unit for most gold retail outside North America. Jewellers in the Gulf, Southeast Asia, Africa, Europe and many other regions quote their daily rate per gram. It is the easiest unit for comparing prices, and it is the unit we show first on most pages.
The troy ounce is 31.1035 grams. It is the unit in which the international gold price is quoted, as dollars per troy ounce. It is heavier than the ordinary or avoirdupois ounce, which is about 28.35 grams, so a troy ounce weighs about 10% more. When a gold price is given "per ounce," it is nearly always the troy ounce. The ounce is the main unit in the United States, Canada and the United Kingdom for coins and bars.
The tola is a traditional unit from South Asia. It is 11.6638 grams, and in Bangladesh it is often called a bhori. It is used in Pakistan, India, Bangladesh and Nepal, and by Gulf jewellers who serve South Asian customers. Prices in Pakistan are commonly quoted per tola. Our gold price per tola page shows the live price in your currency.
In India, gold is often quoted per 10 grams, a convenient round number that sits between a gram and a tola. It is not a traditional unit, only a practical way to state the price.
The mithqal is a traditional unit in parts of the Middle East and Central Asia. It is generally taken as 4.25 grams. It also appears in religious discussions of zakat, where the gold nisab is often stated as 20 mithqal, which is about 85 grams.
In Thailand, gold is sold by the baht weight, which is about 15.244 grams. Thai gold shops commonly trade 96.5% pure gold, so a "baht of gold" is not the same as a baht of 24K.
The tael is an East Asian unit that varies slightly by place. The Hong Kong tael is about 37.4 grams. In Vietnam the luong is 37.5 grams and the chi, a tenth of a luong, is 3.75 grams. Gold shops in Vietnam commonly quote prices per luong or per chi.
A kilogram is 1,000 grams, or about 32.15 troy ounces. Gold bars of one kilogram are a standard size for trading between refiners, banks and bullion dealers.
| Unit | Grams | Troy ounces |
|---|---|---|
| 1 gram | 1 | 0.03215 |
| 10 grams | 10 | 0.3215 |
| 1 mithqal | 4.25 | 0.1366 |
| 1 tola | 11.6638 | 0.3750 |
| 1 Thai baht | 15.244 | 0.4901 |
| 1 troy ounce | 31.1035 | 1 |
| 1 Hong Kong tael | about 37.4 | about 1.20 |
| 1 kilogram | 1,000 | 32.15 |
For any other amount, use the gold unit converter.
Remember that a unit tells you how heavy the item is, not how pure. Ten grams of 22K gold contains about 9.17 grams of pure gold. To find the value of gold in a piece, convert its weight to grams, multiply by the karat divided by 24, and use the price of pure gold. The gold calculator does this for you.
They are very close. A tola is 11.6638 grams, and a bhori, the unit used in Bangladesh, is generally taken as the same weight. Always check the weight on the invoice.
A troy ounce, which is the unit used for gold, is 31.1035 grams. The ordinary ounce used in kitchens is about 28.35 grams, so do not mix them.
Because the troy ounce has been the standard weight for precious metals for centuries, and global markets kept it. It means prices from different countries can be compared on one basis.
Divide the price per troy ounce by 31.1035. Our gold price per gram page does this for you with the live price and your currency.
