Ounces to Grams Converter
Convert avoirdupois ounces (oz) to grams (g). 1 ounce = 28.3495 grams. Note: this converts regular (avoirdupois) ounces, not troy ounces used for precious metals.
Weight Converter
Quick Reference — Ounces to Grams
| Ounces (oz) | Grams (g) |
|---|---|
| 1 oz | 28.35 g |
| 2 oz | 56.70 g |
| 4 oz | 113.40 g |
| 8 oz | 226.80 g |
| 16 oz | 453.59 g |
| 32 oz | 907.18 g |
Avoirdupois vs. Troy Ounces
The avoirdupois ounce is the standard ounce used in the United States for measuring food, packages, and body weight. It equals 28.3495 grams. There are 16 avoirdupois ounces in one avoirdupois pound (453.592 g).
The troy ounce, used exclusively for precious metals, weighs 31.1035 grams — about 9.7% heavier than a regular ounce. There are only 12 troy ounces in a troy pound (373.242 g). Confusingly, a troy ounce is heavier than a regular ounce, but a troy pound is lighter than a regular pound.
Common Confusion in Precious Metals
One of the most common mistakes when entering the precious metals market is confusing avoirdupois ounces with troy ounces. If you weigh a gold bar on a kitchen scale that reads in regular ounces, you'll get a number that is about 10% higher than its actual troy ounce weight. For example, a 1 troy ounce gold coin weighs about 1.097 regular ounces on a standard scale.
Always make sure you know which “ounce” you are working with. Precious metals dealers, exchanges, and spot price quotes always use troy ounces. Kitchen scales, postal scales, and most consumer scales use avoirdupois ounces.
When to Use This Converter
Use this converter when you have a weight in regular (avoirdupois) ounces and need to know the gram equivalent. If you are working with precious metals, you likely want the Troy Ounces to Grams converter instead.