This cage calculator provides a guide to the number of rats that a cage is suitable for,
purely using the volume of the cage. The number of rats that will live happily together
can also be influenced by age, activity levels, sex, temperament and cage furnishings.
Space within a cage must be available to the rats, via shelves, hammocks, ropes etc.
A tall cage with no levels will not house as many rats as a properly furnished cage.
Remember rats need room to run around, to stretch out to sleep, to climb, and to stand up straight on their hind legs.
If you currently have baby rats you should bear in mind that does are likely to grow to about 7-10
inches (18-25cm) long (plus tail) and bucks to about 10-12 inches (25-30cm) long (plus tail). Rats also require a decent
amount of living space even if there is only two of them, and for this reason we recommend that for permanent accommodation,
the cage should be suitable for at least 4 rats even if fewer are going to live in it.