Ounces to Grams Converter
1 ounce (oz) equals 28.349523125 grams (g).
Quick answer
To convert ounces to grams, multiply by 28.35 (exactly 28.349523125). Four ounces is about 113 g, and 16 oz (1 lb) is 453.6 g.
- 1 ounce = 28.34952313 grams
- 1 gram = 0.03527396195 ounces
- Formula: g = oz × 28.349523125
- Quick estimate: multiply by 30 and take off 5%: 6 oz → 180 − 9 = 171 g (exact 170.1).
1 ounce = 28.34952313 grams
How to convert ounces to grams
g = oz × 28.349523125
To convert ounces to grams, multiply the number of ounces by 28.349523125.
Example: 42 oz to g
- Start with the value in ounces: 42 oz.
- Multiply by 28.349523125: 42 × 28.349523125 = 1,190.679971.
- Result: 42 ounces = 1,190.679971 grams.
Going the other way, 1 gram = 0.03527396195 ounces, so to convert grams back to ounces you divide by the same number. See grams to ounces.
Where the conversion factor comes from
The avoirdupois ounce is 1/16 of a pound, so 1 oz = 28.349523125 g exactly (0.45359237 kg ÷ 16). This is the ounce used for food and body weight. Precious metals use the heavier troy ounce, 31.1034768 g.
Mental math: oz to g in your head
Multiply by 30, then take off 5%: 8 oz → 240 → 240 − 12 = 228 g (exact 226.8). Or use 1 oz ≈ 28 g directly.
When you need to convert ounces to grams
- Converting US recipes (cheese, chocolate, meat) to grams.
- Nutrition and portion sizes.
- Postage and small parcel weights.
- Fishing lures, arrows and hobby equipment.
Common mistakes
- Converting fluid ounces with this factor: fl oz measure volume (29.57 mL), not weight.
- Using this factor for gold and silver prices, which are per troy ounce (31.1 g).
Everyday ounces in grams
| Example | Ounces | Grams |
|---|---|---|
| 1 ounce | 1 oz | 28.35 g |
| A slice of cheese | 0.75 oz | 21.262 g |
| US stick of butter | 4 oz | 113.4 g |
| Half-pound burger | 8 oz | 226.8 g |
| 1 pound | 16 oz | 453.59 g |
| A can of soup | 10.75 oz | 304.76 g |
Ounces to grams conversion table
| Ounces (oz) | Grams (g) |
|---|---|
| 0.1 oz | 2.834952313 g |
| 0.2 oz | 5.669904625 g |
| 0.3 oz | 8.504856937 g |
| 0.4 oz | 11.33980925 g |
| 0.5 oz | 14.17476156 g |
| 0.6 oz | 17.00971387 g |
| 0.7 oz | 19.84466619 g |
| 0.8 oz | 22.6796185 g |
| 0.9 oz | 25.51457081 g |
| 1 oz | 28.34952313 g |
| 1.5 oz | 42.52428469 g |
| 2 oz | 56.69904625 g |
| 2.5 oz | 70.87380781 g |
| 3 oz | 85.04856937 g |
| 3.5 oz | 99.22333094 g |
| 4 oz | 113.3980925 g |
| 4.5 oz | 127.5728541 g |
| 5 oz | 141.7476156 g |
| 6 oz | 170.0971387 g |
| 7 oz | 198.4466619 g |
| 7.5 oz | 212.6214234 g |
| 8 oz | 226.796185 g |
| 9 oz | 255.1457081 g |
| 10 oz | 283.4952313 g |
| 11 oz | 311.8447544 g |
| 12 oz | 340.1942775 g |
| 13 oz | 368.5438006 g |
| 14 oz | 396.8933238 g |
| 15 oz | 425.2428469 g |
| 16 oz | 453.59237 g |
| 17 oz | 481.9418931 g |
| 18 oz | 510.2914163 g |
| 19 oz | 538.6409394 g |
| 20 oz | 566.9904625 g |
| 21 oz | 595.3399856 g |
| 22 oz | 623.6895088 g |
| 23 oz | 652.0390319 g |
| 24 oz | 680.388555 g |
| 25 oz | 708.7380781 g |
| 26 oz | 737.0876013 g |
More oz to g values
- 27 oz
- 28 oz
- 29 oz
- 30 oz
- 31 oz
- 32 oz
- 33 oz
- 34 oz
- 35 oz
- 36 oz
- 37 oz
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- 1,000 oz
- 1,200 oz
- 1,500 oz
- 2,000 oz
- 2,500 oz
- 3,000 oz
- 4,000 oz
- 5,000 oz
- 10,000 oz
What is an ounce?
The ounce (avoirdupois ounce) is a unit of mass equal to one sixteenth of a pound, exactly 28.349523125 grams.
What is a gram?
The gram is a metric unit of mass equal to one thousandth of a kilogram.
Convert ounces to other units
Convert other units to grams
Frequently asked questions
How many grams are in an ounce?
One ounce is 28.34952313 grams.
How many ounces are in a gram?
One gram is 0.03527396195 ounces.
What is the formula to convert ounces to grams?
g = oz × 28.349523125.
How many grams is 8 oz?
8 ounces is 226.8 grams.
How many grams is 16 oz?
16 ounces (1 pound) is 453.59 grams.