What is the standard unit of length?

We know some non-standard units of length like hand-span, cubit, etc., and also with standard units of length like meter and centimeter. We have seen a meter-rod used by a tailor. It is used to measure the length of a cloth. The length of a meter-rod is called meter.

One meter is divided into hundred equal parts. One division of this meter is known as one centimeter.

The meter-rod is used to measure the length of cloth, height of a place and small distances like length and breadth of a field, depth of a well, height of a building, etc.

The main standard unit of length is **Meter**.

The short form of meter is **‘m’**.

We use it to measure smaller lengths, such as length and breadth of a book, length of a pen, etc.

Two types of scales are used by the students in a geometry box; one scale is of 30 centimeters length and the other is 15 centimeters long.

There are also long measuring tapes for measuring lengths. A meter-tape is used for tailoring work and it is one and a half meter long. There are some long measuring tapes about 50 meters and 100 meters long. Such tapes are used to measure big lengths such as length and breadth of a field or park, etc.

We use the unit **kilometer** to measure very long distance such as the length of a
road, distance between two cities, etc., The unit kilometer is equal to 1000
meters. In short kilometer is written as **‘km’**.

Thus, we can conclude that there are three
main standard units of length, i.e., kilometer (km), meter (m) and centimeter
(cm). **Click here** to know about the relation between the three units of length.

Standard units are also known as the SI units, which stand for International System of Units.

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Concepts **

**● ****Conversion
of Standard Unit of Length**

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