how long from "your case is ready to be scheduled ..." until interview letter?

[ConstantinYordi]

my I-485 was updated on august 22 to "ready to be scheduled for an interview..."; I am wondering when will I receive the interview appointment letter.
(family adjustment)
thank you,

[Mzander]

That depends on your local field office and their work load. Some places process cases rather fast, others take up to a year. You can look up field office processing times on the USCIS website to get a better idea, but these times aren't always very accurate.