# Convert cm² to mm²

In this worksheet, students will convert areas given in cm² to mm².

Key stage:  KS 2

Curriculum topic:   Measurement

Curriculum subtopic:   Convert Units of Measure

Difficulty level:

#### Worksheet Overview

This activity is about converting areas in cm² to areas in mm².

The diagram above shows a 1 cm square of area 1 cm2.
Each side is 1 cm or 10 mm long.

Each tiny square is 1 mm long and has an area of 1 mm2.

Ten of these tiny squares fit along each side.  There are 100 in total.

1 cm2 = 100 mm2

It is really important to understand that although the conversion factor between cm and mm is 10

(1 cm = 10 mm), the conversion factor between cm2 and mm2 is 100!

Example

Change the area in cm² to an area in mm².

11 cm2
mm2

11 x 100 = 1,100 mm2

Are you ready to have a go at some questions now?

If you find this tricky, you can look at the introduction again by clicking on the red help button on the screen.

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