Convert to length 2.1 cm to mm

Here we need to convert 2. 1 cm to mm.

And for that we will use the following conversion.

1cm = 10 mm

So for 2.1 cm, we will multiply 2.1 and 10 to convert it to mm. Therefore 2.1 cm = 2.1 * 10mm = 21mm

And that's the required answer.