About this tool
This converter uses the exact international standard: 1 ounce equals 28.349523125 grams. Type a value into either field and the other updates instantly — nothing is sent to a server.
Quick reference table
| Grams | Ounces |
|---|---|
| 1 g | 0.035 oz |
| 10 g | 0.35 oz |
| 28 g | 0.99 oz |
| 100 g | 3.53 oz |
| 250 g | 8.82 oz |
| 500 g | 17.64 oz |
Common use cases
- Converting a recipe's ingredient weights between metric and US customary units
- Checking a food package's net weight listed in the unit you're not used to
- Converting a postal or shipping weight for an international package
Things to watch out for
This is a weight (mass) ounce, not a fluid ounce — fluid ounces measure volume, and converting between the two requires knowing the ingredient's density, since a fluid ounce of honey weighs more than a fluid ounce of water. The 28.35 g-per-ounce figure is an exact international definition, so any small rounding differences between calculators come from how many decimal places the result displays, not the underlying conversion.
Grams versus ounces in the kitchen
Recipes written for a metric audience list ingredient weights in grams, while US recipes typically use ounces (and pounds for larger amounts). Baking especially benefits from weighing ingredients by mass rather than measuring by volume, since a cup of flour can vary in actual weight depending on how it's scooped — which is part of why this specific conversion comes up so often for anyone following a recipe written in the other system.
Frequently asked questions
1 ounce equals approximately 28.35 grams. The exact figure is 28.349523125 grams, based on the international avoirdupois ounce standard.
No — this is a weight (mass) ounce, used for solid ingredients and dry goods. A fluid ounce measures volume, not weight, and the two aren't directly interchangeable without knowing the substance's density.
Grams are the standard unit in most of the world, while ounces and pounds remain common in the US — recipes written for an international audience often list both so cooks using either measuring system can follow along accurately.