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The metre, its multiples and submultiples

**Length** is measured in **metres**.

Learn all the multiples andsubmultiples of the metre.

**Length** is measured in **metres**.

Learn all the multiples of the metre: **decametre, hectometre, kilometre**.

What about the submultiples? **D****ecimetre, centimetre and millimetre**.

Learn how **equivalences** work!

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Table of contents of this lesson: The metre, its multiples and submultiples

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## How to measure the length

The **metre** is the **unit of measurement** for **length**.

But you can't measure everything in metres. Try to measure the length of a road. The number is too big! That is why **multiples** exist: **decametre, hectometre and kilometre**.

Now, try to measure the perimeter of a polygon.. do you need a metre? No, its **submultiples** are enough: **decimetre, centimetre and millimetre**.

## How to do unit conversions