You can set the system to convert dimensions from centimetres (cm) to metres (m) when importing files by adding rules to the field mapping.
To amend an existing import template go to:
Import/ export> view all import templates
Open the template
To create a new import template go to:
Import/ export> import wizard
Follow the prompts
Locate the column that you want to add rules to.
Select multiply or divide symbol as appropriate.
Set the static value to the appropriate amount.
In the below example, we are converting shipping width in cm to m by dividing the amount imported by 100.