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.
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).
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.