Calculating hidden value

Hello everyone,
I have a question (hidden value) to calculate the age based on date of birth and current date, the age is being updated for the cases from Commcare app, but it's not working for the cases which was imported from excel (bulk upload using the "import" tool)
is there a solution for this?

Thanks,
Aysha

You're going to have to do the math in excel, and upload the calculated results.

Form logic/calculations do not fire through excel uploads - there's no android/web app to run them