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   Units of Measure / 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.

• The international avoirdupois ounce is equal to about 28.35 grams².

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.

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