Setting aside the poor taste of such a specific question about the gruesome technicalities of mass murder, if you'd like to know about the estimated capacity of the crematoria at Auschwitz, u/commiespaceinvader discusses the subject here. Postwar estimates of the number of people murdered in this particular camp complex were based on the estimated capacity of the crematoria; this number had to be adjusted when it became clear that these facilities were not operating all at once or all the time. However, this conclusion has not affected the total estimated number of victims of the Holocaust.