This is an informative post for those looking to calculate how many rats their cage will hold.

Various cage calculators *

Quote Originally Posted by Rodere
*That calculator also takes into account the shelf space. It might give you a more realistic calculation.

According to the rattycorner calculator, my new Martins cage (24Wx14Dx60H) can hold 5 rats. According to the UK Fancy Rats calculator, it can hold 5.83 rats (so nearly 6). According to the ratzrus calculator, link above, it can hold 5 or 6 maximum.

But, according to the rattycorner calculator, my 34Wx22Dx19H cage can hold up to 4 rats. And on the UK Fancy Rats calculator, it says 4 rats as well. However, the same cage, according to the ratzrus calculator, can only hold 2 because it only has 1 small shelf and the bottom floor space.

So it's height isn't really much of a factor. You can have a seriously tall cage and it could say you can keep 10 rats in it, but if you have only 1 shelf and the floor space, that isn't a realistic number. It's all about the wise use of space and floor area.
Quote Originally Posted by Night
Remember... just like it says on the Ratty Corner website, you owe it to your pets to give them a comfortable and happy home, not just the minimum they can survive on.