The Cement Grinding Office
The Art Of Sharing and...Imagination
The mill sizing page:

Please find below two calculators for sizing mills using the Bond and Rowland methods:

Ball mill sizing: Calculator for ball mill(s) in a single stage circuit.

Rod ball mill sizing:
Calculator for rod mill(s) as first stage of the circuit and ball mill(s) as second stage of the
Ball mill sizing
Rod ball mill sizing