How Many Grams Are in 1 Ounce?
The answer depends on which ounce you mean. Regular ounces and the
troy ounces used for precious metals have different weights.
1 oz = 28.3495 g
Use this for everyday ounce-to-gram weight conversions.
1 ozt = 31.1035 g
Use this when converting an ounce of gold or silver to grams.
Is 1 ounce of gold 28 or 31 grams?
A troy ounce of gold is approximately 31.1 grams.
The 28.35-gram figure refers to a regular ounce.
To convert ounces to grams:
multiply regular ounces by 28.3495, or gold and silver troy ounces by 31.1035.
Enter any amount in the converter below for the result.
A regular ounce equals 28.3495 grams, but for measuring gold, silver, and platinum, the troy ounce is used, which equals 31.1035 grams.
Ounces to Grams Conversion Table
| Ounces | Regular ounces (oz) | Gold & silver troy ounces (ozt) |
|---|---|---|
| 0.5 | 14.1748 g | 15.5517 g |
| 1 | 28.3495 g | 31.1035 g |
| 2 | 56.6990 g | 62.2070 g |
| 5 | 141.7476 g | 155.5174 g |
| 10 | 283.4952 g | 311.0348 g |
How Do You Convert Ounces to Grams?
Multiply the number of regular ounces by 28.349523125.
For gold or silver measured in troy ounces, multiply by
31.1034768. For example, 3.75 troy ounces of gold
equal approximately 116.6380 grams.
Does Gold Purity Change the Ounce Conversion?
No. One troy ounce always weighs 31.1035 grams, regardless of purity.
Purity changes how much of that weight is pure gold. If a coin is
described as containing one troy ounce of fine gold, its
total weight may be higher when it also contains other metals.