How Many Grams in a Troy Ounce?
Quick Answer
There are approximately 31.10 grams in a troy ounce.
1 troy oz = 31.1035 g
Understanding the Conversion
One troy ounce equals 31.1035 grams — about 10% heavier than an avoirdupois ounce (28.35 g). Gold, silver, platinum, and other precious metals are universally weighed in troy ounces. The troy pound has only 12 troy ounces (vs. 16 oz in an avoirdupois pound).
Formula
1 troy oz = 31.1035 g
Common Examples
| Description | Value |
|---|---|
| 1 oz gold bullion coin | 31.10 g (1 troy oz) |
| Silver price per troy oz | 31.10 g of silver |
| 1 troy oz vs. standard oz | 31.10 g vs. 28.35 g |
Quick Reference Table
Use this table for quick conversions between troy ounce and grams:
| troy ounce | grams |
|---|---|
| 1 | 31.104 |
| 2 | 62.207 |
| 5 | 155.52 |
| 10 | 311.04 |
| 25 | 777.59 |
| 50 | 1,555.18 |
| 100 | 3,110.35 |
Frequently Asked Questions
How Many Grams in a Troy Ounce?
There are approximately 31.10 grams in a troy ounce. One troy ounce equals 31.1035 grams — about 10% heavier than an avoirdupois ounce (28.35 g). Gold, silver, platinum, and other precious metals are universally weighed in troy ounces. The troy pound has only 12 troy ounces (vs. 16 oz in an avoirdupois pound).
What is the formula to convert troy ounce to grams?
The formula is: 1 troy oz = 31.1035 g. To convert, multiply the number of troy ounces by 31.104 to get the equivalent in grams.
How do I convert grams to troy ounce?
To convert grams to troy ounce, divide the number of grams by 31.104. For example, 155.52 grams equals 5 troy ounces.