Size Of FRA

My Data Size is 450 GB and I have taken 250 GB space for Index Tablespace and 20 to 30 % extra space would make my Database size of 1 TB,

Please advise what should be my FRA size.

Thanks

Ashish

Suggest looking at this this slide deck - page 15 has a very good formula:

www.oracle.com/…/13445-pedregalcolvin-514442.pdf