Convert Gram to Ounce
Conversion Formula
oz = g × 0.035274To convert Gram to Ounce, use the formula above. This is the standard conversion factor used worldwide.
Conversion Table
| Gram (g) | Ounce (oz) |
|---|---|
| 1 | 0.035274 |
| 100 | 3.527400 |
| 500 | 17.637000 |
| 1000 | 35.274000 |
Why convert Gram to Ounce
Recipes from outside the US, and increasingly baking recipes generally, list ingredient weights in grams because it's more precise than volume measures like cups. Cooks with a kitchen scale that reads in ounces, or checking a package weight against a postage rate, need the gram figure translated into the ounce their scale or shipping label uses.
Where the number comes from
This page converts using the avoirdupois ounce, the everyday ounce used for food, body weight, and general retail, which equals exactly 28.349523125 grams. That is a different, heavier ounce from the troy ounce used for precious metals like gold and silver, which equals 31.1034768 grams, so a gram figure converted with the wrong ounce will be off by about 10 percent.
Quick reference
| 1 g | 0.0353 oz | avoirdupois ounce |
| 1 oz | 28.3495 g | avoirdupois, exact ratio 28.349523125 |
| 1 troy oz | 31.1035 g | used for gold, silver, and other precious metals |
| 100 g | 3.5274 oz | a common recipe or nutrition label weight |
| 500 g | 17.637 oz | just over 1 lb |
| 28 g | 0.9877 oz | a common single-serving snack weight |
Common mistakes
- Confusing the avoirdupois and troy ounce is the single biggest mistake here, and it matters most when pricing metal: gold is quoted per troy ounce, so applying the everyday ounce conversion to a gram figure of gold understates its price by roughly one tenth.
- Recipe conversions also get mangled when people confuse a weight ounce (grams) with a fluid ounce (a volume measure for liquids), since the two are not interchangeable even for water, where they happen to land close only by coincidence.
Frequently Asked Questions
Why is gold priced in troy ounces instead of the regular ounce?
The troy system has been the standard for weighing precious metals since medieval trade fairs, and it stuck even after most everyday weight moved to avoirdupois, so bullion, coins, and gemstones still price by the heavier troy ounce.
How much heavier is a troy ounce than a regular ounce?
About 10 percent, 31.10 g against 28.35 g, small enough to overlook but large enough to visibly misprice metal if you use the wrong one.
Does 1 gram of water weigh the same as 1 milliliter?
Yes, by definition at standard conditions, which is why grams and milliliters are sometimes used interchangeably for water and similar liquids. That does not extend to weight ounces and fluid ounces, which measure different things.
How do I convert a recipe that lists grams to ounces on a US kitchen scale?
Multiply the gram figure by 0.0353, or switch the scale itself to a gram mode if it has one, which avoids the conversion step and any rounding entirely.