A gram is one thousandth of a kilogram.
Grams to Troy ounces Converter — g to oz t
Convert Gram (g) to Troy ounce (oz t) using the exact conversion factor (1 gram = 0.0321507466 troy ounce). See the formula, worked examples, conversion table, history, and common uses.
Grams to Troy ounces converter
Converter
Mass/Weight Converter
Convert SI mass, imperial weight, jewelry, atomic, and astronomy mass units.
Context values
Some unit families need one extra value for a physically accurate result.
A troy ounce is exactly 31.1034768 grams.
Result = input x 0.001 / 0.0311034768.
Mass uses the kilogram as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Grams to Troy ounces
Weight conversions between Gram and Troy ounce come up constantly in everyday commerce, shipping, and cooking, since US packaging is usually labeled in pounds while most of the rest of the world uses kilograms. Gram is most often used for cooking and nutrition labeling worldwide (including in the us, alongside ounces).
Formula
troy ounces = grams × 0.0321507465686
This factor comes from each unit's defined relationship to the category's base unit: 1 gram equals 0.001 base units, and 1 troy ounce equals 0.0311034768 base units, so dividing one by the other gives the direct gram-to-troy ounce factor of 0.0321507465686.
Simple example
1 g × 0.03215074657 = 0.0321507466 oz t
1 gram = 0.0321507466 troy ounces.
Real-world example
50 g × 0.03215074657 = 1.607537328 oz t
50 grams = 1.607537328 troy ounces.
Conversion table
| Gram (g) | Troy ounce (oz t) |
|---|---|
| 1 g | 0.0321507466 oz t |
| 5 g | 0.1607537328 oz t |
| 10 g | 0.3215074657 oz t |
| 25 g | 0.8037686642 oz t |
| 50 g | 1.607537328 oz t |
| 100 g | 3.215074657 oz t |
Reverse conversion: Troy ounce to Gram
0.0321507466 oz t × 31.1034768 = 1.000000001 g
0.0321507466 troy ounces = 1.000000001 grams.
grams = troy ounces × 31.1034768
For a page dedicated to this direction, see Troy ounce to Gram.
Understanding the Gram
Gram (g) measures mass. A gram is one-thousandth of a kilogram, the SI base unit of mass. It is classified as a SI derived (metric prefix) unit.
Where it's used: Standard small-mass unit worldwide
Uses of the Gram today
- Cooking and nutrition labeling worldwide (including in the US, alongside ounces)
- Precious metal and small-item weighing
- Scientific and laboratory measurement
History of the Gram
Originally defined in 1795 as the mass of one cubic centimeter of water, the gram follows directly from the kilogram (1/1000 of it) under the modern SI system, inheriting the kilogram's various historical and current definitions.
Historical origin. Gram was not the invention of a single named person; it developed through the process described above.
Understanding the Troy ounce (oz t)
A troy ounce is exactly 31.1034768 grams.
Gram — sources
- BIPM — The kilogram (SI base unit) — Basis for the gram as 1/1000 of the kilogram.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many troy ounces are in 1 gram?
1 gram equals 0.0321507466 troy ounces, using the exact defined conversion factor rather than an estimate.
How do I convert gram to troy ounce?
Multiply the gram value by 0.03215074657. The converter above does this instantly to whatever precision you set.
How do I convert troy ounce back to gram?
Use the reverse factor: 1 troy ounce equals 31.1034768 grams. You can also use the swap control in the converter above to flip the direction instantly.
What is a gram?
Gram (g) measures mass. A gram is one-thousandth of a kilogram, the SI base unit of mass. It is classified as a SI derived (metric prefix) unit.
What is a troy ounce?
Troy ounce (oz t) is a unit of mass/weight.
Is the gram to troy ounce conversion exact?
Yes. Both gram and troy ounce are defined by fixed standards rather than physical artifacts, so the factor of 0.03215074657 used above is exact to as many digits as you choose to display.
Where is the gram still used today?
Standard small-mass unit worldwide