# Standard Unit of Capacity

In measurement of capacity we will learn about the standard unit of capacity and volume. We know that the maximum quantity of a container or vessel can hold is called its capacity.

The capacity of a vessel is also called it’s the inner volume. We use the word volume as the amount of space taken up by a solid. If the mouth of the vessel is closed, it is like a solid. So the space taken by a closed mouth vessel will be called the outer volume of the container/vessel and the capacity of the vessel will be similar to the inner volume of the vessel.

Liter is the standard unit of capacity and the smaller unit of capacity is milliliter. In short liter is written as ‘l’ and milliliter as ‘ml’.

Liter (l) and milliliter (ml) are related to each other as:

1 liter = 1000 milliliter (1 l  = 1000 ml).

Different liquids (milk, kerosene oil, diesel, petrol etc.) are measured in liters. Different liquid medicines are measured in ml.

There are some standard sized vessels or container of different shapes of one-liter capacity which are used to measure liquids.

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