This oz to grams converter changes ounces into grams as you type, with the exact definition of the ounce. American recipes, meat counters, protein tubs and package weights use ounces; a metric scale, a nutrition app or a recipe from abroad wants grams. It runs in your browser and spends no credits.
How many grams are in an ounce
One ounce is exactly 28.349523125 grams, usually rounded to 28.35 g. That is the avoirdupois ounce, the ounce of weight used for food and everyday goods. A pound is 16 of them, 453.59237 g.
If the ounces are on a bottle of liquid, they are probably fluid ounces, a measure of volume, and the Oz to ML page is the right one.
Oz to grams formula
Multiply the ounces by 28.3495:
g = oz × 28.349523125
For a rough figure, multiply by 30 and take off a little: 8 oz × 30 = 240, and the exact answer is 226.80 g. Multiplying by 28 lands closer, 224 g.
Ounces to grams chart
| Ounces | Grams |
|---|---|
| 0.25 oz | 7.09 g |
| 0.5 oz | 14.17 g |
| 1 oz | 28.35 g |
| 2 oz | 56.70 g |
| 3 oz | 85.05 g |
| 4 oz | 113.40 g |
| 5 oz | 141.75 g |
| 6 oz | 170.10 g |
| 8 oz | 226.80 g |
| 10 oz | 283.50 g |
| 12 oz | 340.19 g |
| 16 oz (1 lb) | 453.59 g |
| 32 oz (2 lb) | 907.18 g |
Worked example: steaks and burgers
An 8 oz steak is 8 × 28.3495 = 226.80 g, and a 12 oz ribeye is 340.19 g. A quarter-pound burger patty, 4 oz before cooking, is 113.40 g. If you track protein in grams of food, typing the package weight in ounces gives the number to log.
Reading packages in oz and grams
Many US packages print both: a 16 oz bag says 453 g or 454 g, depending on how it rounds. A 6 oz can of tuna is 170.10 g. When only ounces are printed, the converter fills in the metric weight in a second, and pressing swap lets you check a metric recipe against what is in the cupboard.
FAQ
How many grams are in 4 oz?
113.40 g, which is a quarter pound.
Is a troy ounce the same?
No. The troy ounce used for gold and silver is 31.1034768 g, about 9.7 percent heavier. The converter uses the ordinary avoirdupois ounce.
What does it cost?
It comes with the Nexin library: Nexin Lite or Nexin Pro opens it, and it spends no credits.
