1 ounce = 28.349523125 grams
Kitchen scales are where this conversion bites: 28.35 g per ounce is the figure most recipes assume, but the exact value is 28.349523125 g. Over a 16-ounce batch the difference is under a hundredth of a gram, so rounding is safe here in a way it is not for bulk trade.
Formula g = oz × 28.349523125
Type in either field — the other updates on every keystroke. Need other units? Open the full weight converter.
| Ounce | Gram |
|---|---|
| 1 oz | 28.349523 g |
| 2 oz | 56.699046 g |
| 3 oz | 85.048569 g |
| 4 oz | 113.398093 g |
| 5 oz | 141.747616 g |
| 10 oz | 283.495231 g |
| 15 oz | 425.242847 g |
| 20 oz | 566.990463 g |
| 25 oz | 708.738078 g |
| 50 oz | 1417.476156 g |
| 100 oz | 2834.952313 g |
| 500 oz | 14174.761562 g |
| 1000 oz | 28349.523125 g |
| Gram | Ounce |
|---|---|
| 1 g | 0.035274 oz |
| 2 g | 0.070548 oz |
| 3 g | 0.105822 oz |
| 4 g | 0.141096 oz |
| 5 g | 0.17637 oz |
| 10 g | 0.35274 oz |
| 15 g | 0.529109 oz |
| 20 g | 0.705479 oz |
| 25 g | 0.881849 oz |
| 50 g | 1.763698 oz |
| 100 g | 3.527396 oz |
| 500 g | 17.636981 oz |
| 1000 g | 35.273962 oz |
| Situation | From | To |
|---|---|---|
| Slice of cheese | 1 oz | 28.35 g |
| Stick of butter | 4 oz | 113.4 g |
| Block of cream cheese | 8 oz | 226.8 g |
| Steak | 12 oz | 340.19 g |
| Pound of ground beef | 16 oz | 453.59 g |
Multiply by 28, or by 30 and subtract 5%. For 8 oz: 8 × 28 = 224 g, against an exact 226.8 g.
US recipes and food labels use ounces, but scales and most other countries use grams. A stick of butter is 4 oz or 113.4 g, a block of cream cheese is 8 oz or 226.8 g, and a pound of ground beef is 16 oz or 453.6 g. Postal rates and jewellery weights also switch between the two.
This page is for weight ounces. Fluid ounces measure volume (about 29.57 ml in the US), so 8 fl oz of water weighs roughly 237 g while 8 oz of flour is 226.8 g. Troy ounces, used for gold and silver, are 31.1035 g.
The avoirdupois ounce is one sixteenth of a pound, so the 1959 pound agreement fixed it at exactly 28.349523125 g. The word comes from the Latin uncia, one twelfth, which survives in the troy system.
Related guides: Imperial vs metric: differences and quick conversion tricks · US cups to grams: flour, sugar, butter and more · How to scale a recipe up or down: the maths and the science · Top 20 liquid ingredients in cooking and how to measure them · Troy vs avoirdupois ounces: the weight of precious metals