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Ounces to Grams Converter

Weighing something in ounces and want grams? These are weight ounces, not the fluid kind. Choose the everyday avoirdupois ounce or the troy ounce used for gold and silver.

Ounces ⇄ Grams (weight)
oz
=
g
Ounce type:
Result8 oz = 226.8 g (Avoirdupois)
Quick answer
The ounce on your kitchen scale is the avoirdupois ounce, and it weighs 28.3495 g, so multiply ounces by 28.3495 to get grams. Jewellers and bullion dealers use the heavier troy ounce of 31.1035 g instead. Both are units of mass, unrelated to the fluid ounce that measures liquids.

Conversion table

Ounces (oz)Grams (g)
1 oz28.35
2 oz56.7
4 oz113.4
8 oz226.8
12 oz340.19
16 oz453.59
24 oz680.39
32 oz907.18

How to convert Ounces to Grams

grams = oz × 28.3495avoirdupois · troy oz = 31.1035 g · reverse: oz = grams ÷ 28.3495
oz
the weight in ounces
grams
the same weight in grams
28.3495
grams in one everyday (avoirdupois) ounce
31.1035
grams in one troy ounce

If the ounces on your label describe a liquid, they are probably fluid ounces. In that case start from the fluid ounces to mL tool, which handles volume.

Frequently asked questions

What does 1 ounce weigh in grams?

A standard avoirdupois ounce is 28.3495 g. The troy ounce, used for precious metals, is heavier at 31.1035 g.

How many grams is 8 oz?

8 ounces weigh 226.8 g, which is exactly half a pound.

How much is a pound in grams?

A pound is 16 ounces, or 453.59 g.

Why is a troy ounce different?

The troy system is an old standard kept for gold, silver and gemstones. Its ounce, 31.1035 g, is about 10 percent heavier than the everyday one.

What is 100 g in ounces?

100 g is close to 3.53 avoirdupois ounces.

Are these the same as fluid ounces?

No. These weigh mass. A fluid ounce measures volume and needs the liquid before it can become grams.

Quick facts
Everyday ounce
28.3495 g
Troy ounce
31.1035 g
1 pound
453.59 g
Measures
Weight