Reptile Calculators
Tank size, UVB distance and husbandry calculators for bearded dragons, turtles, snakes and other reptiles.
- Bearded Dragon Tank CalculatorCalculate the correct tank size for your bearded dragon by age or length. 40-gal minimum for adults — covers baby, juvenile, adult stages.housingOpen
- Turtle Tank Size CalculatorCalculate the correct tank size for aquatic turtles (sliders, painted, musk) using the 10-gal-per-inch-of-shell rule.housingOpen
- Reptile UVB Distance CalculatorCalculate the correct distance from a UVB bulb for your reptile species (desert vs tropical) based on Ferguson zones.husbandryOpen
- Leopard Gecko Tank CalculatorCalculate correct enclosure size for leopard geckos. Minimum 20 gal for adult; 30-40 gal recommended. Baby, juvenile, adult life-stages.housingOpen
- Ball Python Enclosure CalculatorCalculate correct enclosure size for ball pythons. Modern standards: 4×2×2 ft (120 gal equivalent) for adults — much larger than old tub advice.housingOpen
- Crested Gecko EnclosureCorrect enclosure size for crested geckos. Minimum 18×18×24" for adults; vertical orientation for arboreal species. Hatchling to adult sizing.housingOpen
- Corn Snake EnclosureCalculate correct enclosure size for corn snakes by snake length. Modern standard: 4'×2'×2' (120 gal equivalent) for adults.housingOpen
- Chameleon EnclosureCorrect screen-cage size for veiled, panther and Jackson's chameleons. Minimum 2'×2'×4' for adults — vertical orientation, mesh sides for airflow.housingOpen
- Tortoise EnclosureEnclosure size for Russian, Greek, Sulcata, Red-foot tortoises. Sulcatas need 10×10 ft outdoor adult.housingOpen
- Snake Prey SizeCorrect prey size for snakes: 1-1.5× the snake's girth at the widest point. Pinkie through jumbo rat sizing.feedingOpen
- Reptile HumidityTarget humidity for 15+ reptile species: ball python 55-65%, crested gecko 60-80%, bearded dragon 30-40%.husbandryOpen
- Bearded Dragon Calcium ScheduleGenerate a 7-day calcium and D3 dusting schedule for bearded dragons based on life stage, UVB quality and diet composition. MBD prevention.nutritionhealthOpen
About reptiles in the United States
Reptile keeping has modernized significantly since 2015 — bioactive enclosures, larger vivariums, and UV-light research (Ferguson zones) have replaced the old 'shoebox tub' husbandry. Our reptile calculators reflect current ARAV, ReptiFiles and academic husbandry standards.
What's new in reptile husbandry
PVC enclosures replacing glass aquariums (better temperature gradient), UVB for nocturnal species (even ball pythons benefit), larger footprints (ball pythons in 4×2×2 ft rather than tubs), and bioactive substrate setups that self-clean.
Reptile calculator FAQ
Do all reptiles need UVB?
Diurnal species (bearded dragons, tortoises, uromastyx) require it for vitamin D synthesis. Nocturnal and crepuscular species (ball pythons, leopard geckos) benefit from low-output UVB per current research.
Why is my reptile not eating?
Most common causes: temperature wrong (check with our humidity and Ferguson zone calculators), shedding soon, breeding season (males often fast), or stress from new setup. Refusing food for weeks warrants a vet exam.
How accurate are these calculator results?
Our calculators implement the exact formulas used in veterinary textbooks, AAFCO/NRC nutrition standards, AAHA/AAFP life-stage guidelines, and peer-reviewed research. Results are accurate within the precision of the input data. For medical decisions (toxicity, drug dosing, diabetic insulin), always confirm with your veterinarian — calculators are educational tools, not clinical devices.