If your culture is in stationary phase after 16 hours in TSB, then you can just do a titer for CFU from the overnight culture, determine what the cell count is and then prepare the appropriate dilution to get to 108

Make a 0.5 MacFarland standard using 1% Barium chloride and 1% H2SO4 ..see Mackie McCartney textbook. The adjust your broth culture according to this

..can match turbidity also for both

For kirby - bauer use overnight growth with normal salin than comper with MaccFarlabd for turbidity, or measure the turbidty.

Assalamoalaikom

from young bacterial culture of 18 hours on isolation medium, scrape a few well isolated and perfectly identical colonies

Mix the suspension well, its opacity must be equivalent to 0.5 Mc Farland or an OD of (0.08 to 0.10) at 625 nm.

Best wishes.