Grams to Ounces Converter
Both ounces, kept separate, because gold and flour aren't weighed in the same unit.
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Two different ounces. The everyday avoirdupois ounce is 28.35 g. The troy ounce used for precious metals is 31.10 g, about 10 percent heavier. A gold price quoted per ounce means troy. Most converters offer only one and don't say which.
The formulas
1 oz (troy) = 31.1034768 g (exact)
1 lb = 16 oz avoirdupois = 453.59237 g (exact)
Both ounce definitions are exact. Note that a troy pound is 12 troy ounces, not 16, so the pound relationship doesn't carry across either.
Conversion table
| Grams | Ounces (avoirdupois) | Troy ounces | Pounds |
|---|---|---|---|
| 1 g | 0.0353 | 0.0322 | 0.0022 |
| 5 g | 0.1764 | 0.1608 | 0.0110 |
| 10 g | 0.3527 | 0.3215 | 0.0220 |
| 25 g | 0.8818 | 0.8038 | 0.0551 |
| 28 g | 0.9877 | 0.9002 | 0.0617 |
| 50 g | 1.7637 | 1.6075 | 0.1102 |
| 100 g | 3.5274 | 3.2151 | 0.2205 |
| 200 g | 7.0548 | 6.4301 | 0.4409 |
| 250 g | 8.8185 | 8.0377 | 0.5512 |
| 500 g | 17.6370 | 16.0754 | 1.1023 |
| 1000 g | 35.2740 | 32.1507 | 2.2046 |
Common questions
How many grams make 1 ounce?
28.349523125 grams exactly, for the everyday avoirdupois ounce. A troy ounce, used for precious metals, is 31.1034768 grams.
Is 30 g equal to 1 oz?
Close but not equal. One ounce is 28.35 grams, so 30 grams is about 1.06 ounces. The 30 gram approximation is fine for rough cooking and wrong for anything precise.
How do I convert grams to ounces for gold?
Use the troy ounce, not the ordinary one. Gold, silver and platinum are priced per troy ounce of 31.1034768 grams, about 10 percent heavier than the avoirdupois ounce. Switch the mode above.
Is the gram to ounce factor exact?
The ounce is defined as exactly 28.349523125 grams, so that direction is exact. The reverse figure of 0.03527396 is a rounded reciprocal.
Related converters and guides
Sources
- NIST Guide to the SI, Appendix B: Conversion Factors. National Institute of Standards and Technology. Source for every conversion factor on this page, and for which factors are exact rather than rounded.