Ounces to Grams Converter (oz to g)

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Updated October 27, 2026

Ounces are used for food and postal weights in the US and UK, while grams are the metric standard. One ounce is about 28.35 grams. This free ounces to grams converter converts instantly in both directions and includes a quick reference table.

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Type in any field to change it. Press × on a value to calculate that field instead.

How to use the ounces to grams converter

Type a value in Ounces (oz) and the other units update instantly. Every field is live, so you can just as easily start from grams or any other unit and convert back.

Ounces to grams formula

grams = ounces × 28.349523125

1 oz = 28.3495 g, and 1 g = 0.035274 oz.

oz to g chart

oz g oz g
0.25 7.08738 8 226.796
0.5 14.1748 10 283.495
1 28.3495 12 340.194
2 56.699 14 396.893
3 85.0486 16 453.592
4 113.398 20 566.99
5 141.748 24 680.389
6 170.097 32 907.185

g to oz chart

g oz g oz
1 0.035274 125 4.40925
5 0.17637 200 7.05479
10 0.35274 250 8.81849
25 0.881849 454 16.0144
28 0.987671 500 17.637
50 1.7637 1,000 35.274
100 3.5274

Definitions

  • Ounce (avoirdupois): exactly 28.349523125 g. 16 oz = 1 lb.
  • Troy ounce: 31.1035 g — used only for precious metals.
  • Fluid ounce: a unit of volume, not weight. See the mL to oz converter.

Cooking

Ingredient amount Grams
1 oz butter 28 g (2 tbsp)
4 oz (¼ lb) 113 g — one US stick of butter
8 oz (½ lb) 227 g
16 oz (1 lb) 454 g

Gold and silver: troy ounces

Precious metals are priced per troy ounce (31.1035 g), which is about 10% heavier than a regular ounce. A 1 oz gold coin contains 31.1 g of gold.

Postage

Letter and parcel rates are often set in ounces in the US: a 1 oz letter is about 28 g.

Frequently asked questions

How many grams is 1 oz?

28.35 g.

How many grams is 8 oz?

226.8 g.

How many ounces is 100 g?

3.53 oz.

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