Superpet cage how many comfortably will fit

[tinytippytoes]

If I get three ferrets Females will they be comfty in there? I cant seem to find a ferret calculator. I'm talking about the 4 full levels. Its 54 inches h 32 inches wide 20 inches in depth. I found a clever way to make a large door for it for easy cleaning and I got it quite cheap but almost new! Lucky me or should I say lucky rattys(for now).