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How Many Grams in an Ounce

Before we start explaining how many grams are in an ounce, we should make sure that you clearly understand the meaning of the terms “ounce” and “gram”.

The ounce1 belongs to so called imperial weight units.


This unit is commonly used in the USA and many other countries.

But there is also the international troy ounce. This one equals to approximately 32.1 grams and is used for measurement of gold and other precious metals. Remember about it and do not mix them up.

Some people can confuse ounce as units of weight with fluid ounces, which are units of capacity. Take it into consideration.

Grams are much easier for understanding. They are from the metric system. One thousand grams make up one kilogram, one thousand kilograms make up on ton, etc.

How Many Grams in an Ounce

As stated above, one international avoirdupois ounce equals to 28.35 grams. It is pretty difficult to convert ounces to grams and vice versa, so the following table will help you to do it.

Ounce
Gram
Ounce
Gram
1
28.3495231
20
566.990462
2
56.6990462
30
850.485693
3
85.0485693
40
1133.980924
4
113.3980924
50
1417.476155
5
141.7476155
60
1700.971386
6
170.0971386
70
1984.466617
7
198.4466617
80
2267.961848
8
226.7961848
90
2551.457079
9
255.1457079
100
2834.95231
10
283.495231
999
2806.6027869
  1. The ounce (abbr. oz) is a unit of mass or volume (fluid ounce), which is used in many systems and has several definitions. The most regular definition of this unit is equivalent to approximately 28,34 grams (the imperial ounce).
  2. The gram (abbr. g) is a weight unit from the International System of Units. One kilogram, which is the basic unit of the ISU contains one thousand grams.
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