Convert ounces to grams
Ounce (oz) to gram (g). One ounce equals 28.3495 grams.
Formula
Ounce to gram conversion table
| Ounces | Grams | Grams | Ounces |
|---|---|---|---|
| 1 oz | 28.3495 g | 1 g | 0.035274 oz |
| 2 oz | 56.699 g | 2 g | 0.070548 oz |
| 3 oz | 85.0486 g | 3 g | 0.105822 oz |
| 5 oz | 141.75 g | 5 g | 0.17637 oz |
| 10 oz | 283.5 g | 10 g | 0.35274 oz |
| 20 oz | 566.99 g | 20 g | 0.705479 oz |
| 50 oz | 1417.48 g | 50 g | 1.7637 oz |
| 100 oz | 2834.95 g | 100 g | 3.5274 oz |
| 500 oz | 14174.76 g | 500 g | 17.637 oz |
| 1000 oz | 28349.52 g | 1000 g | 35.274 oz |
Decimal ounces to grams conversion table
The exact decimal amounts people look up most often, worked out with the same factor the converter above uses. Every row is calculated, not rounded off a chart.
| Ounces | Grams |
|---|---|
| 0.035 oz | 0.992233 g |
| 0.1 oz | 2.835 g |
| 0.15 oz | 4.2524 g |
| 0.1667 oz | 4.7259 g |
| 0.2 oz | 5.6699 g |
| 0.25 oz | 7.0874 g |
| 0.28 oz | 7.9379 g |
| 0.3 oz | 8.5049 g |
| 0.33 oz | 9.3553 g |
| 0.35 oz | 9.9223 g |
| 0.4 oz | 11.3398 g |
| 0.45 oz | 12.7573 g |
| 0.5 oz | 14.1748 g |
| 0.55 oz | 15.5922 g |
| 0.6 oz | 17.0097 g |
| 0.65 oz | 18.4272 g |
| 0.67 oz | 18.9942 g |
| 0.7 oz | 19.8447 g |
| 0.75 oz | 21.2621 g |
| 0.8 oz | 22.6796 g |
| 0.85 oz | 24.0971 g |
| 0.9 oz | 25.5146 g |
| 0.95 oz | 26.932 g |
| 1 oz | 28.3495 g |
| 1.05 oz | 29.767 g |
| 1.1 oz | 31.1845 g |
| 1.15 oz | 32.602 g |
| 1.2 oz | 34.0194 g |
| 1.25 oz | 35.4369 g |
| 1.3 oz | 36.8544 g |
| 1.35 oz | 38.2719 g |
| 1.4 oz | 39.6893 g |
| 1.45 oz | 41.1068 g |
| 1.5 oz | 42.5243 g |
| 1.55 oz | 43.9418 g |
| 1.6 oz | 45.3592 g |
| 1.65 oz | 46.7767 g |
| 1.7 oz | 48.1942 g |
| 1.75 oz | 49.6117 g |
| 1.8 oz | 51.0291 g |
| 1.85 oz | 52.4466 g |
| 1.9 oz | 53.8641 g |
| 1.95 oz | 55.2816 g |
| 2 oz | 56.699 g |
Grams back to ounces
The same conversion in reverse, for when you have the answer and need the question.
| Grams | Ounces |
|---|---|
| 1 g | 0.035274 oz |
| 5 g | 0.17637 oz |
| 10 g | 0.35274 oz |
| 25 g | 0.881849 oz |
| 50 g | 1.7637 oz |
| 100 g | 3.5274 oz |
| 200 g | 7.0548 oz |
| 250 g | 8.8185 oz |
| 500 g | 17.637 oz |
| 750 g | 26.4555 oz |
| 1000 g | 35.274 oz |
Where the ounce to gram factor comes from
- The international avoirdupois pound is exactly 0.45359237 kg by the 1959 international yard and pound agreement.
- The avoirdupois ounce is one sixteenth of that pound: 0.45359237 ÷ 16 = 0.028349523125 kg exactly.
- A kilogram is 1000 grams, so one ounce is exactly 28.349523125 g. Every digit of that number is definitional, which is why this converter can show it in full.
- grams = ounces × 28.349523125. The rounded 28.35 that most charts print is fine for cooking but drifts at larger weights, so UnitGlide keeps the exact factor.
Sources
Common mistakes
Troy ounces weigh more
A troy ounce is 31.1034768 g, not 28.349523125 g. If you are weighing gold, silver or platinum, the price is quoted per troy ounce and this page will read about 10 percent light. Everything else (food, post, parcels, body weight) uses the avoirdupois ounce shown here.
Fluid ounces are volume
A fluid ounce does not weigh an ounce. One US fluid ounce of water weighs about 29.6 g, not 28.3 g, and one fluid ounce of oil or flour weighs something else again. Grams measure mass, so converting fl oz to grams needs the density of the specific substance, not a fixed factor.
To convert ounces to grams, multiply the number of ounces by 28.3495. One ounce equals 28.3495 grams, and one gram equals 0.035274 ounces, so the relationship is fixed and exact. As a worked example, 10 oz comes to 283.5 g. Enter your own figure in the converter above to get an instant answer, or use the swap button to flip the direction. This is a mass conversion, and like every tool on UnitGlide it runs locally in your browser with no account or upload required. The table further down shows a range of common ounce values already worked out in grams, plus the reverse gram to ounce direction, which is handy for quick reference or double-checking a result by hand.
Frequently asked questions
How many grams is 0.28 oz?
0.28 oz is 7.94 g. Multiply ounces by 28.349523125: 0.28 × 28.349523125 = 7.9379, which rounds to 7.94 g.
How many grams is 0.035 oz?
0.035 oz is 0.99 g, just under one gram. Going the other way, 1 g is about 0.0353 oz, which is why 0.035 oz and 1 g are so close.
Is an ounce 28 or 28.35 grams?
Neither, exactly. The avoirdupois ounce is exactly 28.349523125 g. The 28.35 you see on charts is that number rounded to two decimals, and 28 is a kitchen shortcut that is about 1.2 percent light.
How many grams are in an ounce?
One ounce equals 28.3495 grams. The ratio is constant, so you can multiply any number of ounces by 28.3495 to get grams.
What is the formula to convert ounces to grams?
Use grams = ounces × 28.3495. UnitGlide applies this exact formula for every value, so results stay accurate across the whole range.
How do I convert grams back to ounces?
Go the other way by using one gram equals 0.035274 ounces. You can also press the swap button in the converter above to flip the direction in one click.
Is this ounce to gram converter accurate?
Yes. It uses internationally defined SI conversion factors, as maintained by the BIPM, and all math runs in your browser so nothing is rounded away on a server. For everyday use the displayed precision is more than enough.