To convert grams to ounces (g to oz), multiply by 0.035274. 1 gram equals 0.035274 oz, about the same as a paperclip.
| grams | ounces |
|---|---|
| 1 gram | 0.035274 oz |
| 2 grams | 0.070548 oz |
| 5 grams | 0.17637 oz |
| 10 grams | 0.35274 oz |
| 25 grams | 0.88185 oz |
| 50 grams | 1.7636981 oz |
| 100 grams | 3.5273962 oz |
| 250 grams | 8.8184905 oz |
| 500 grams | 17.636981 oz |
| 1000 grams | 35.273962 oz |
Definition: 1/1000 of a kilogram - though it was actually the original base unit the kilogram was later built from, not the other way round.
History: Introduced during the same French Revolution-era push for the metric system, originally defined as the mass of one cubic centimeter of pure water. A single gram turned out to be too small and impractical for most everyday weighing, which is why the kilogram - not the gram - ended up as the actual SI base unit: an odd historical quirk that has stuck ever since.
Current use: Food nutrition labels, recipes, and small precise measurements worldwide - basically anything too small to comfortably measure in kilograms.
Definition: 1/16 of a pound, or about 28.35 grams.
History: Traces back to the same Roman "uncia" that gave English the inch - both mean "a twelfth" in Latin, since the ounce was originally 1/12 of an ancient Roman pound rather than the 1/16 it is today.
Current use: Food packaging and recipes in the US. Precious metals worldwide use a completely different "troy ounce" instead, about 10% heavier than a regular ounce - the number quoted for a gold price is always a troy ounce.
This follows from the pound being defined as exactly 0.45359237 kilograms, so the factor is exact.
No simple round multiplier is close enough to be useful, so this is one to look up rather than estimate. The exact factor is 0.0352740.
Going the other way, one ounce is 28.35 g, which is usually the easier direction to work in. Because the forward factor is small, watch the decimal place rather than the digits: a factor-of-ten slip is the common error, not a rounding one.
To anchor the scale: 50 grams is about 1.76 oz.