Reptile Enclosure Size Calculator
Minimum and recommended enclosure dimensions for 9 reptile species — with heating, substrate and humidity
🦎 Reptile Enclosure Size Calculator
Get exact minimum and recommended enclosure dimensions for your reptile species and age
Why Most Commercial Reptile Cages Are Too Small
The reptile enclosures sold at most pet shops are designed to be affordable and stackable — not to meet the animal’s welfare needs. Most adult bearded dragons, blue tongue skinks, and ball pythons quickly outgrow starter kits. Planning for adult size from the beginning saves money and stress.
Glass vs PVC vs Screen Enclosures
Glass enclosures retain humidity poorly, making them better suited for desert species. PVC enclosures retain heat and humidity far better, making them ideal for tropical snakes and high-humidity species. Screen enclosures maximise airflow and are essential for chameleons, which develop respiratory infections in glass or PVC setups.
Why Bigger Is Always Better
A larger enclosure allows a proper thermal gradient — a warm basking zone, a cool retreat, and everything in between. Without a gradient, a reptile cannot thermoregulate and its immune system, digestion, and behaviour are all compromised. There is no such thing as a cage that is too large for a reptile.
Cohabitation Warning
Most reptiles on this list are solitary and will fight, stress, or cannibilise cage mates. Bearded dragons, leopard geckos, chameleons, and uromastyx must be kept alone. The only exceptions are same-sex leopard gecko females and some uromastyx pairs under experienced supervision.