Seldons
ounces to grams
1 ounce = 28.3495 grams.
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How do you convert ounces to grams?
Use this formula. It is exact — these units are defined by international agreement, not measured.
g = oz × 28.3495231
Example: 10 oz × 28.3495231 = 283.495 g.
ounces to grams conversion table
Common values, rounded to six significant figures.
| oz | g |
|---|---|
| 1 oz | 28.3495 g |
| 2 oz | 56.699 g |
| 3 oz | 85.0486 g |
| 4 oz | 113.398 g |
| 5 oz | 141.748 g |
| 6 oz | 170.097 g |
| 8 oz | 226.796 g |
| 10 oz | 283.495 g |
| 12 oz | 340.194 g |
| 16 oz | 453.592 g |
| 20 oz | 566.99 g |
| 24 oz | 680.389 g |
| 32 oz | 907.185 g |
| 48 oz | 1,360.78 g |
| 64 oz | 1,814.37 g |
| 100 oz | 2,834.95 g |
American recipes and shipping labels are written in ounces, and every metric kitchen scale and customs form wants grams. One ounce is exactly 28.349523125 g, so the common shortcut of 28 g is 1.2% light — fine for a stew, not fine for 25 kg of freight, where it drops nearly 300 g.
Values worth remembering
These come up often enough that knowing them saves a lookup.
- 16 oz = 453.592 gone pound
- 8 oz = 226.796 ga US cup
Questions people ask
How many grams is 1 ounce?
1 ounce is 28.3495 grams.
How many ounces is 1 gram?
1 gram is 0.035274 ounces.
How do you convert ounces to grams in your head?
Use × 28.35. That lands within a percent or so of the exact figure, which is close enough for packing, shipping estimates and shopping — use the calculator when the number has to be right.
Is the ounce to gram conversion exact?
Yes. The relationship is exact by international agreement, so 28.3495231 is a definition rather than a measurement. Rounding in the answer comes from display, not from the conversion.