The short answer
One lượng, also commonly called one cây, equals 10 chỉ and 37.5 grams. In international units, one lượng is approximately 1.20565 troy ounces.
1 lượng of gold = 1 cây of gold = 10 chỉ = 37.5 grams ≈ 1.20565 troy ouncesQuick conversion tables
| Unit | Equivalent mass |
|---|---|
| 1 lượng of gold | 1 cây of gold |
| 1 lượng of gold | 10 chỉ |
| 1 lượng of gold | 100 phân |
| 1 lượng of gold | 37.5 grams |
| 1 lượng of gold | 0.0375 kilograms |
| 1 lượng of gold | Approximately 1.20565 troy ounces |
| Unit | Equivalent mass |
|---|---|
| 1 chỉ | 3.75 grams |
| 1 chỉ | Approximately 0.120565 troy ounces |
| 1 phân | 0.375 grams |
| 1 troy ounce | 31.1034768 grams |
| 1 troy ounce | Approximately 8.29426 chỉ |
| 1 troy ounce | Approximately 0.829426 lượng |
Are lượng and cây different units?
In common Vietnamese usage, one cây of gold is understood to be the same as one lượng of gold. Both equal 10 chỉ or 37.5 grams.
A price table may express its unit in several ways. You should therefore check the accompanying unit instead of looking at the number alone.
- VND per lượng.
- Thousands of VND per lượng.
- VND per chỉ.
- Thousands of VND per chỉ.
How many grams are in one chỉ of gold?
Because one lượng equals 10 chỉ and 37.5 grams, one chỉ equals 3.75 grams. Smaller traditional units use the relationship that one chỉ equals 10 phân, making one phân equal to 0.375 grams.
1 chỉ = 37.5 ÷ 10 = 3.75 grams1 chỉ = 10 phân1 phân = 0.375 grams| Number of chỉ | Mass |
|---|---|
| 2 chỉ | 7.5 grams |
| 5 chỉ | 18.75 grams |
| 8 chỉ | 30 grams |
| 10 chỉ | 37.5 grams = 1 lượng |
Which kind of ounce is used for gold?
In precious-metals markets, “ounce” generally means the troy ounce, abbreviated as oz t or troy oz.
According to the London Bullion Market Association (LBMA), one troy ounce equals 31.1034768 grams.
A troy ounce is not the ordinary ounce used for some everyday goods. That ordinary unit, known as the avoirdupois ounce, weighs approximately 28.35 grams. Confusing the two produces a materially incorrect gold-price conversion.
1 troy ounce = 31.1034768 gramsHow to convert lượng to troy ounces
Divide the number of grams by 31.1034768 to convert it to troy ounces. For one lượng of gold, the result is approximately 1.205653 troy ounces, or 1.20565 when rounded to five decimal places.
Troy ounces = Grams ÷ 31.103476837.5 ÷ 31.1034768 ≈ 1.205653 troy ounces1 lượng of gold ≈ 1.20565 troy ouncesHow to convert troy ounces to lượng
Multiply the number of troy ounces by 31.1034768 and divide by 37.5. One troy ounce is therefore approximately 0.829426 lượng or 8.29426 chỉ.
Lượng = Troy ounces × 31.1034768 ÷ 37.51 × 31.1034768 ÷ 37.5 ≈ 0.829426 lượng1 troy ounce ≈ 0.82943 lượng ≈ 8.29426 chỉConversion examples for several masses
| Mass | Chỉ | Grams | Approximate troy ounces |
|---|---|---|---|
| 0.1 lượng | 1 chỉ | 3.75 g | 0.120565 oz t |
| 0.5 lượng | 5 chỉ | 18.75 g | 0.602826 oz t |
| 1 lượng | 10 chỉ | 37.5 g | 1.205653 oz t |
| 2 lượng | 20 chỉ | 75 g | 2.411306 oz t |
| 5 lượng | 50 chỉ | 187.5 g | 6.028265 oz t |
| 10 lượng | 100 chỉ | 375 g | 12.056530 oz t |
Does converting mass also convert the price?
Not by itself. A mass conversion only establishes the relationship between lượng, chỉ, grams and troy ounces. Converting a world gold quote into VND per lượng also requires the international gold price, a chosen USD/VND exchange rate, the mass-conversion factor and the tool’s rounding rules.
- The international gold price in USD per troy ounce.
- The selected USD/VND exchange rate.
- The troy-ounce-to-lượng conversion factor.
- The tool’s rounding rules.
Reference price-conversion formula
The formula produces a mathematical reference price. It does not automatically equal the buying or selling price of gold bars, plain rings or jewellery in Vietnam.
Vietnamese prices may also differ because of product type, brand, supply and demand, costs and each dealer’s pricing policy. Fineness is a separate factor: two products with the same mass but different gold purity do not necessarily have the same value.
You can use the gold conversion tool on giavangbac.app to compare the figures, while keeping in mind that its result remains for reference only.
Converted VND/lượng price = USD/troy ounce price × USD/VND rate × 37.5 ÷ 31.1034768Common misunderstandings
Does one lượng of gold equal one ounce?
No. One lượng equals 37.5 grams, whereas one troy ounce equals 31.1034768 grams. A lượng is therefore heavier than a troy ounce and equals approximately 1.20565 troy ounces.
Are a gold lượng and an ordinary Vietnamese lạng the same?
No. Do not use the food-measurement meaning of lạng to infer the mass of gold. In Vietnamese gold trading, one lượng or cây is understood to mean 37.5 grams, not 100 grams.
Can the 28.35-gram ounce be used to calculate gold prices?
No. International precious-metals prices use the 31.1034768-gram troy ounce. Using the ordinary avoirdupois ounce gives an incorrect result.
Do one lượng of 18K gold and one lượng of 24K gold have the same mass?
Yes, provided each product is exactly one lượng: both weigh 37.5 grams. Their pure-gold content differs, however, so their value and quoted prices can differ.
Conclusion
Whenever you read a gold price, check whether the table uses VND per lượng, VND per chỉ or USD per troy ounce. Matching the units correctly is essential for an accurate comparison or conversion.
1 lượng = 1 cây = 10 chỉ = 37.5 grams ≈ 1.20565 troy ounces1 troy ounce = 31.1034768 grams ≈ 8.29426 chỉ ≈ 0.82943 lượng