here's the formular:
(((amount of ram in gb)*(cpu clock speed in GHz))/((hdd size in gb)*(hdd max read speed in mb/s)+(wordlist size in gb)))*ln(1)
(((amount of ram in gb)*(cpu clock speed in GHz))/((hdd size in gb)*(hdd max read speed in mb/s)+(wordlist size in gb)))*ln(1)