Grams To Ounces Converter
Convert everyday weights using the international avoirdupois ounce.
The Short Answer
1 gram = 0.035274 ounces
So if you're holding a 100-gram bag of something, that's about 3.53 ounces. And if a recipe calls for 8 ounces of an ingredient, that's roughly 227 grams.
Common Conversions at a Glance
| Grams | Ounces |
|---|---|
| 5 g | 0.18 oz |
| 10 g | 0.35 oz |
| 20 g | 0.71 oz |
| 25 g | 0.88 oz |
| 30 g | 1.06 oz |
| 50 g | 1.76 oz |
| 75 g | 2.65 oz |
| 100 g | 3.53 oz |
| 150 g | 5.29 oz |
| 200 g | 7.05 oz |
| 250 g | 8.82 oz |
| 500 g | 17.64 oz |
| 1,000 g | 35.27 oz |
And the other direction, since people often start from ounces instead:
| Ounces | Grams |
|---|---|
| 1 oz | 28.35 g |
| 2 oz | 56.70 g |
| 4 oz | 113.40 g |
| 8 oz | 226.80 g |
| 12 oz | 340.19 g |
| 16 oz (1 lb) | 453.59 g |
Why the Number Isn't a Round One
You might notice 28.3495 isn't a clean number, and that's simply because grams and ounces come from two completely different measuring traditions. The gram belongs to the metric system, built around powers of ten. The ounce comes from the older imperial and US customary systems, which were never designed to divide evenly into metric units. When the two systems were formally reconciled in the 20th century, the ounce was defined as exactly 28.349523125 grams — an oddly specific number, but a fixed and internationally agreed one.
A Detail Most Converters Skip: There's More Than One "Ounce"
Here's something worth knowing before you trust any grams-to-ounces conversion blindly: the word "ounce" doesn't always mean the same thing.
The avoirdupois ounce (28.35 g) is the everyday ounce — the one used for food, body weight, shipping packages, and pretty much anything you'd weigh on a kitchen or bathroom scale. This is what every conversion on this page refers to.
The troy ounce (31.1035 g) is a different, heavier unit used specifically for precious metals — gold, silver, platinum. If you've ever seen a gold price quoted "per ounce," that's almost always the troy ounce, not the everyday one. Mixing these up when pricing or weighing metal leads to a real, non-trivial error.
The fluid ounce isn't a weight at all — it's a measure of volume, used for liquids. A fluid ounce of water weighs close to an avoirdupois ounce, but a fluid ounce of honey or oil won't, since fluid ounces measure space, not mass.
If a conversion ever looks slightly "off" from what you expected, checking which kind of ounce is actually meant is often the reason.
Where Grams and Ounces Are Actually Used
The mix of grams and ounces you'll run into depends heavily on where you are:
- The United States is one of the few places in the world where the ounce remains the everyday standard for food packaging, postage, and body weight, alongside Myanmar and Liberia — the only other countries that haven't fully adopted the metric system.
- Canada officially switched to the metric system in the 1970s, so grams are the standard on food labels — but ounces still show up regularly in everyday use, especially for things like meat portions at a butcher counter or produce sold by the pound.
- The UK, Australia, and most of the world rely on grams and kilograms for virtually everything, with the ounce mostly surviving in a few informal or traditional contexts.
This is part of why grams-to-ounces conversions matter so much for cooking specifically — a recipe from a US food blog and one from a European cookbook can list the exact same ingredient in two completely different units, and getting the conversion right is the only way to actually follow both accurately.
A Quick Way to Estimate Without a Calculator
If you just need a rough figure and don't want to do exact math, dividing grams by 28 (instead of 28.35) gets you close enough for casual use — the error is small enough not to matter unless you need precision. For anything where the exact amount actually matters — nutrition tracking, baking ratios, or precious metals — stick to the full 28.3495 figure or use a proper converter.
Quick Reference
- 28 g ≈ 1 oz
- 57 g ≈ 2 oz
- 113 g ≈ 4 oz
- 227 g ≈ 8 oz (half a pound)
- 454 g ≈ 16 oz (1 pound)
The Bottom Line
The core conversion is simple once you have the number: 1 ounce equals 28.3495 grams, full stop. The part that actually trips people up isn't the math — it's making sure you're using the right kind of ounce for the right context, since the everyday ounce, the troy ounce, and the fluid ounce are three genuinely different things wearing the same name.
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