# 400cc is like many ounces

## What's an ounce? Simply explained with examples

What an ounce is is easy to explain, but not exactly defined. We'll show you how the term came about, what it means and of course what an ounce weighs. ### What is an ounce - a simple explanation

The term ounce comes from the Latin word "uncia", which means "one twelfth".
• The ounce has a long history; after all, it has always been weighed. In the time around 5,500 BC. Barley and wheat grains formed the basis for weights. The reason was simple: the grains are fairly constant in weight.
• The Romans later adopted part of this Greek number and weight system. However, they have simplified it. However, you did not use the number 10 as a basis for this, as we know it today from the decimal system.
• The Romans took the number 12 as a basis. This is why this system is also called the duodecimal system. The duodecimal system has a decisive advantage over the decimal system: The number 12 can be subdivided more easily.
• Using the duodecimal system, fractions such as half, a quarter or a third can be better represented.
• This is how the "Uncia", the "twelfth" as a unit of measurement for a mass, was created.
• In Germany, the ounce is no longer a common unit of weight and is therefore not permitted.

### One ounce is not the same as one ounce

We'll give you a few examples of ounces. There are actually different definitions of it.
• In some countries, ounces are still used today as a weight for weighing food. As already mentioned, this is not permitted in Germany. This type of ounce is also called the "common ounce". If you convert an ordinary ounce into grams, it is equivalent to 28.35 grams.
• Then there is the apothecary ounce. It is used to weigh chemicals and medicines and is equivalent to 31.1034768 grams.
• The same weight, i.e. 31.1034768 grams, is one troy ounce on the scales. This also describes the weight of precious metals such as gold or silver.

### Riddle tip: how much do these animals weigh together? We will explain the difference between king and emperor in the next article.