I need to add a custom option to a simple product which will be number of pages. This needs to get multiplied rather than added to other fields.


  1. Black and white (€0.03) or Colour (€0.15)
  2. Paper quality: Say €0.02

After the user chooses black and white and the paper quality, this adds up to (€0.03+ €0.02) €0.05 which needs to be multiplied by the number of pages (another custom field) that the document being uploaded (in another custom field) contains.

Is this possible in any way?

1 Answer 1


I believe this is not possible per default, but should be possible by creating an own option. At least it's possible to implement custom pricing for a custom option (which will override that one of specified in the product settings)

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