Oz to g conversion formula
The ounce (oz) equals 28.3495 grams. Used for food portions, postal items and precious metals (troy ounce).
The gram (g) is one thousandth of a kilogram — the standard for nutrition labels, recipes and jewelry.
Oz to g conversion table
| oz | g |
|---|---|
| 1 oz | 28.3495 g |
| 2 oz | 56.699 g |
| 3 oz | 85.0485 g |
| 5 oz | 141.7475 g |
| 10 oz | 283.495 g |
| 20 oz | 566.99 g |
| 25 oz | 708.7375 g |
| 50 oz | 1417.47 g |
| 100 oz | 2834.95 g |
| 250 oz | 7087.38 g |
| 500 oz | 14174.75 g |
| 1000 oz | 28349.5 g |
How to convert oz to g
- Write down the value in oz you want to convert.
- Multiply it by 28.3495 — or use the converter above, which does it instantly.
- Read your result in g. Done.
Real-world examples
- A standard chocolate bar is 1.55 oz — 43 g, printed on every European wrapper.
- A golf ball weighs 1.62 oz — 45.9 g, the legal maximum of the sport.
- A slice of sandwich bread is about 1 oz — 28 g, the reference portion on nutrition labels.
- Coffee lovers: 8 oz of whole beans — 227 g — is the classic half-pound bag.
Common mistakes
The #1 confusion in all of cooking: the ounce (weight) versus the fluid ounce (volume). They are different units: 8 fl oz of water fills a cup but weighs 8.3 oz — and for flour or oil the gap is larger. Converting fl oz to grams requires the ingredient's density; converting oz to grams does not. Second trap: gold and silver are sold in troy ounces — 31.1 g, not 28.35. An “ounce” of gold is 10% heavier than an ounce of flour, by design.
Quick mental conversion
Multiply by 30 and subtract 5%: 6 oz → 180 → −9 = 171 g (exact: 170.1). Or memorize the three anchors that cover most recipes: 1 oz = 28 g · 4 oz = 113 g · 8 oz = 227 g. Everything else is arithmetic between those stops.
Frequently asked questions
How many g is 1 oz?
Using the official conversion factor, 1 ounce = 28.3495 gram. The converter above handles any value instantly.
What is the formula to convert ounce to gram?
1 ounce = 28.3495 gram. Multiply any value in oz by this factor to get g.
Is this oz to g converter free?
Yes — 100% free, unlimited, with no sign-up. CalculUnits is funded by non-intrusive ads, never by paywalls.