Troy Ounce to Grams Calculator
Convert between troy ounces (oz t) and grams (g) instantly. The troy ounce is the standard unit of weight for precious metals like gold, silver, platinum, and palladium. Perfect for bullion trading, jewelry, and precious metals investing.
What Is a Troy Ounce?
A troy ounce (oz t) is a unit of weight used primarily for precious metals such as gold, silver, platinum, and palladium. It is part of the troy weight system, which dates back to the Roman Empire and was widely used in medieval Europe for weighing precious metals and gemstones.
One troy ounce is defined as exactly 31.1034768 grams. This is about 10% heavier than the more common avoirdupois ounce (28.3495 grams), which is used for everyday weight measurements in the United States.
The troy system uses a pound of 12 troy ounces (373.24 g), as opposed to the avoirdupois pound of 16 ounces (453.59 g). The troy ounce remains the global standard for precious metals trading and bullion pricing.
How Does the Troy Ounce to Grams Calculator Work?
The calculator uses the exact conversion factor:
1 Troy Ounce = 31.1034768 Grams
This is the internationally agreed-upon definition of the troy ounce.
For conversion:
Grams = Troy Ounces × 31.1034768
Troy Ounces = Grams ÷ 31.1034768
Simply enter a value in either troy ounces or grams, select the direction of conversion, and the calculator will instantly compute the equivalent weight.
Why Use This Troy Ounce to Grams Calculator?
- Two-Way Conversion: Convert from troy ounces to grams and from grams to troy ounces.
- Exact Factor: Uses the internationally agreed conversion factor (31.1034768).
- Precious Metals Focus: Perfect for gold, silver, platinum, and palladium trading.
- Reference Table: Quick reference for common troy ounce values.
- Free & Private: No registration, no data storage.
Common Troy Ounce Equivalents
- 1 Troy Ounce = 31.1034768 g = 480 grains
- 1 Troy Ounce ≈ 1.09714 avoirdupois ounces
- 1 Troy Pound = 12 troy ounces = 373.2417 g
- 1 Kilogram = 32.1507465 troy ounces
- 1 Grain = 64.79891 mg
❓ Troy Ounce to Grams FAQ
What is a troy ounce?
A troy ounce (oz t) is a unit of weight used for precious metals. It is defined as exactly 31.1034768 grams and is the global standard for gold, silver, platinum, and palladium trading.
How many grams are in a troy ounce?
There are exactly 31.1034768 grams in one troy ounce.
How many troy ounces are in a gram?
One gram is equal to approximately 0.0321507466 troy ounces.
What is the difference between a troy ounce and a regular ounce?
A troy ounce weighs 31.1034768 grams, while a standard (avoirdupois) ounce weighs 28.3495 grams. The troy ounce is about 10% heavier.
Why are troy ounces used for precious metals?
The troy ounce has been used for precious metals since medieval times. It remains the global standard for bullion trading because of tradition and international consistency.
What is the difference between a troy ounce and a troy pound?
A troy pound contains 12 troy ounces (373.24 g), whereas a standard (avoirdupois) pound contains 16 ounces (453.59 g).
How do I convert troy ounces to grams?
Multiply the number of troy ounces by 31.1034768. For example, 5 oz t × 31.1034768 = 155.517384 g.
How do I convert grams to troy ounces?
Divide the number of grams by 31.1034768. For example, 100 g ÷ 31.1034768 = 3.21507466 oz t.
What is a grain in the troy system?
A grain is the smallest unit in the troy system. One troy ounce contains 480 grains, and one grain is exactly 64.79891 mg.
How many troy ounces are in a kilogram?
One kilogram contains approximately 32.1507465 troy ounces.
What is the symbol for a troy ounce?
The symbol for a troy ounce is oz t (or sometimes just "oz" in precious metals contexts).
Is a troy ounce the same for all precious metals?
Yes. The troy ounce is the same weight regardless of the metal — gold, silver, platinum, and palladium all use the same 31.1034768 gram definition.
What is the history of the troy ounce?
The troy ounce traces back to the Roman monetary system and was widely used in medieval Europe. It was named after the French city of Troyes, an important trading center in the Middle Ages.
How accurate is this troy ounce to grams calculator?
This calculator uses the exact conversion factor (31.1034768) and provides results with customizable decimal precision, making it suitable for professional precious metals trading and investing.
What is the difference between a troy ounce and a UK ounce?
The UK ounce (also called the imperial ounce) is the same as the avoirdupois ounce — 28.3495 grams. It is different from the troy ounce used for precious metals.
How do I convert troy ounces to avoirdupois ounces?
Multiply troy ounces by 1.09714 to get avoirdupois ounces. For example, 1 oz t × 1.09714 = 1.09714 oz avoirdupois.
Why is the troy ounce used in the London bullion market?
The London bullion market, which sets global gold and silver prices, uses the troy ounce as its standard unit of weight, a tradition that dates back centuries.