About this tool
This converter uses the exact international standard: 1 ounce equals 28.349523125 grams. Grams are divided by that figure and ounces multiplied by it, and the result is rounded to at most four decimal places, so 100 g reads as 3.5274 oz.
How to use the converter
- Type a weight into the Grams box.
- Read the Ounces box, which updates with each keystroke.
- To convert ounces to grams, type into Ounces instead and read the Grams box. Decimals such as 0.5 oz work.
Worked example
A US recipe asks for a 4 oz portion of cheese and your scale reads in grams. Type 4 into Ounces and the Grams box shows 113.3981, because 4 × 28.349523125 = 113.3980925. Going the other way, a 250 g pack typed into Grams gives 8.8185 oz (250 ÷ 28.349523125 = 8.81849…).
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 ounce is defined internationally as exactly 28.349523125 g, and 28.35 is that figure rounded, so small differences between calculators come from rounding the factor or the displayed result, not from the definition.
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.
Grams to ounces chart
One ounce is exactly 28.349523125 grams. Ounce values in this chart are rounded to two decimals; the converter above shows four.
| Grams | Ounces |
|---|---|
| 1 g | 0.04 oz |
| 5 g | 0.18 oz |
| 10 g | 0.35 oz |
| 25 g | 0.88 oz |
| 50 g | 1.76 oz |
| 100 g | 3.53 oz |
| 150 g | 5.29 oz |
| 200 g | 7.05 oz |
| 250 g | 8.82 oz |
| 454 g | 16.01 oz |
| 500 g | 17.64 oz |
| 1000 g | 35.27 oz |
How to convert grams to ounces by hand
Divide the grams by 28.35. For 200 g: 200 / 28.35 = 7.05 oz. A shortcut is to divide by 30 for a quick estimate, which gives 6.7 oz. For ounces to grams, multiply by 28.35, so a 4 oz portion is about 113 g.
Ounces for food, gold and shipping
The everyday ounce used for food and mail (the avoirdupois ounce) is 28.35 g. Precious metals use the troy ounce, which is heavier at 31.10 g, so a one-ounce gold coin weighs more than a one-ounce packet of coffee. Postal rates in the US are based on ounces up to 16 (one pound), so converting your parcel weight from grams helps you pick the right rate. Larger weights can be changed with the kg to lbs converter.
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.
100 grams is 3.5274 ounces to four decimal places (100 ÷ 28.349523125), or just over 3½ oz. Ten times that, 1 kilogram, is 35.274 oz, which is 2 lb 3.274 oz.