Reptile UVB & Enclosure Calculator
Calculate the correct UVB lighting, enclosure dimensions, and temperature gradients for your reptile. Based on species-specific requirements from herpetological research.
Reptile Husbandry Guide
UVB Lighting — Non-Negotiable for Diurnal Species
UVB light is essential for diurnal (day-active) reptiles such as bearded dragons, blue-tongued skinks, and water dragons. Without UVB, they cannot synthesise vitamin D3, leading to metabolic bone disease (MBD) — a painful, debilitating, and often fatal condition. The UV Index (UVI) at the basking spot should match the species' natural environment: shade-dwellers need UVI 0–0.7, forest species 1–3, open country species 3–6, desert species 4–6+. Nocturnal species (leopard geckos, ball pythons) do
Enclosure Size
The Arcadia reptile keeper's guide recommends minimum enclosure length of 2× the reptile's total length, width of 1×, and height appropriate to the species' climbing needs. A 40cm bearded dragon needs at minimum an 80×40×40cm enclosure — though 120×60×60cm is more appropriate for an adult. Never house a reptile in an enclosure where it cannot thermoregulate properly (move between warm and cool zones). Front-opening vivariums allow easier access and less stress than top-opening tanks.
Temperature Gradients
All reptiles are ectothermic (cold-blooded) — they regulate body temperature by moving between warm and cool areas. A proper thermal gradient is essential: a basking spot at the high end of the species' preferred body temperature (POTZ), a cool end at ambient or slightly above, and intermediate zones in between. A reptile permanently in one area indicates the gradient is wrong — stuck at the basking spot means the enclosure is too cold; hiding constantly means too hot. Use a digital thermometer
Common Husbandry Mistakes
The most common preventable health problems in captive reptiles: MBD from insufficient UVB or calcium, respiratory infections from inadequate temperatures or humidity, dysecdysis (incomplete shedding) from low humidity, impaction from loose substrate ingestion (sand, gravel, walnut shell), and stress from inadequate hides (every reptile needs at least two — one warm, one cool). Research your specific species thoroughly before acquiring — different species have very different care requirements, a
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