1 ounce works out at 28.3 grams. Everything below is that one figure scaled, amount by amount.
Ounces to grams: full chart
| Ounces | Grams |
|---|---|
| 1/8 oz | 3.54 g |
| 1/4 oz | 7.09 g |
| 1/2 oz | 14.2 g |
| 1 oz | 28.3 g |
| 2 oz | 56.7 g |
| 3 oz | 85 g |
| 4 oz | 113 g |
| 6 oz | 170 g |
| 8 oz | 227 g |
| 12 oz | 340 g |
| 16 oz | 454 g |
1/8 ounce to grams
1/8 ounce is 3.54 grams. Working from 1 ounce is 28.3 grams, 0.125 scales to 3.54.
1/4 ounce to grams
1/4 ounce is 7.09 grams. Four of these make 1 ounce, which is 28.3.
1/2 ounce to grams
1/2 ounce is 14.2 grams. That is 28.3 multiplied by 0.5, since 1 ounce is 28.3 grams.
1 ounce to grams
1 ounce is 28.3 grams. Working from 1 ounce is 28.3 grams, 1 scales to 28.3.
2 ounces to grams
2 ounces is 56.7 grams. Take the 1 ounce figure of 28.3 grams and multiply by 2 to get there.
3 ounces to grams
3 ounces is 85 grams. That is 28.3 multiplied by 3, since 1 ounce is 28.3 grams.
4 ounces to grams
4 ounces is 113 grams. That is 28.3 multiplied by 4, since 1 ounce is 28.3 grams.
8 ounces to grams
8 ounces is 227 grams. Half this amount, 4 ounces, comes to 113; double it and you are at 454.
Why this figure never moves
This one is fixed by definition rather than measured, so it carries no rounding and no dependence on what is being weighed. One ounce is exactly 28.3 grams, and every row above is that one ratio multiplied out.
The definitions were agreed internationally and have not moved since. A figure from an old cookbook and one from today agree exactly.
The troy ounce is a different unit
Gold and silver are weighed in troy ounces at 31.10 g each, against 28.35 g for the ounce used for food. Nothing in a kitchen uses the troy ounce.
Using the chart above
Rows either side of the figure you want are there on purpose. Most recipes need a neighbouring amount at some point, and scaling is a matter of reading one row over.
What can change the answer
Nothing about the ingredient. The only way to get a different answer is to be working in a different system than you think you are.
Going the other way: grams to ounces
| Grams | Ounces |
|---|---|
| 2 1/2 g | 0.088 oz |
| 3.54 g | 1/8 oz |
| 5 g | 0.176 oz |
Reading it backwards works on the same figure, and these rows show which way it moves.
Measuring it properly
Check the scale is switched to the unit you actually want. Most read grams and ounces both ways, and a number read against the wrong unit is the commonest reason a doubled recipe fails.
When you can round and when you cannot
Rounding down is the safer direction for salt, acid and anything strong. The difference can be added later; it cannot be taken back out.
The commonest slip
Confusing the troy ounce with the ordinary one. The troy ounce is ten per cent heavier and belongs to precious metals; nothing in a kitchen uses it, but figures found online sometimes do.
Where this conversion turns up
Packaging, recipes and kitchen equipment rarely agree on units. 1 ounce is 28.3 grams — the figure to keep in mind when they disagree.
Scaling it up and down
Half of 1 ounce is 14.2 grams. Double it and you have 56.7 grams; triple it and you are at 85 grams. A batch cut to a quarter needs 7.09 grams.
The relationship is a straight multiple all the way through, so any factor scales the same way.
How much precision this needs
The exact figure for 1 ounce is 28.3. Written the way most cooks would write it, 28 grams, it is out by 0.35 — about 1.2 per cent. On one batch that is invisible.
Scaled four times the gap is 1.4, which is where it starts to show in anything that has to set.
Other ways this gets asked
The same question is typed in these ways, and the chart above covers every one:
- Ounces to Grams: Full Conversion Chart?
- How Much Is An Ounce?
- How Many Grams Are In A Half Ounce?
- 1/2 oz to g: Exactly 14.2 g?
- 1/4 oz to g: Exactly 7.09 g?
- 1/8 oz to g: Exactly 3.54 g?
- How Much Is 4 Oz?
- How Much Is 8Oz?
- How Much Is 8 Ounce?
Related conversions
For every kitchen figure in one place, see the full conversion chart.
