Reptile & Terrarium
Calculators
From bearded dragon feeding schedules to terrarium sizing and UVB lighting — every calculator is free, instant, and vet-informed. No sign-ups needed.
Reptile Calculators
20+ free tools for reptile owners, keepers, and breeders.
Bearded Dragon Weight Calculator
Estimate healthy weight from age and length for bearded dragons. Tracks growth stages from hatchling to adult.
Calculate ➜Leopard Gecko Weight Calculator
Calculate healthy body weight ranges for leopard geckos by age and total length measurements.
Calculate ➜Ball Python Weight Calculator
Estimate healthy weight range for ball pythons using length-to-weight ratio guidelines and body condition scoring.
Calculate ➜Corn Snake Weight Calculator
Calculate expected weight from length for corn snakes using species-specific body condition scoring charts.
Calculate ➜Crested Gecko Weight Calculator
Assess crested gecko weight and body condition from age and snout-to-vent length (SVL) measurements.
Calculate ➜Terrarium Size Calculator
Find the minimum enclosure size for 40+ reptile species based on adult length, activity level, and species requirements.
Calculate ➜Reptile Heating Wattage Calculator
Calculate the wattage needed to maintain basking and ambient temperatures in your enclosure size and material type.
Calculate ➜UVB Lighting Calculator
Determine the correct UVB bulb strength (T5/T8) and placement distance for your reptile species and enclosure size.
Calculate ➜Reptile Humidity Calculator
Get target humidity ranges and misting frequency recommendations by species and enclosure substrate type.
Calculate ➜Bioactive Enclosure Calculator
Calculate substrate depth, drainage layer thickness, and cleanup crew density for bioactive vivarium setups.
Calculate ➜Temperature Gradient Calculator
Plan hot spot, warm side, and cool side temperature zones for any enclosure size and species requirement.
Calculate ➜Reptile Water Dish Size Calculator
Determine the right water dish size for soaking and hydration based on species, body length, and enclosure dimensions.
Calculate ➜Bearded Dragon Feeding Calculator
Get feeding frequency, portion size, and vegetable-to-insect ratios for bearded dragons by age and life stage.
Calculate ➜Reptile Feeding Schedule Calculator
Feeding frequency and prey or feeder size recommendations by species, age, weight, and current body condition.
Calculate ➜Feeder Insect Calculator
Calculate how many crickets, dubia roaches, or mealworms to feed per session based on reptile size and species.
Calculate ➜Snake Prey Size Calculator
Determine appropriate feeder rodent size from pinky to jumbo rat based on your snake’s current weight and girth.
Calculate ➜Reptile Supplement Calculator
Calcium and vitamin D3 dusting frequency recommendations by species, UV exposure level, and diet type.
Calculate ➜Reptile Age Calculator
Convert your reptile’s age to a life stage percentage and estimated remaining lifespan by species and care quality.
Calculate ➜Brumation Calculator
Generate a brumation schedule with temperature drop timeline, fasting period, and safe wake-up date for your species.
Calculate ➜Shedding Cycle Calculator
Estimate shed frequency by species, age, and growth rate. Track upcoming sheds with pre-shed humidity tips.
Calculate ➜Reptile Incubation Calculator
Calculate incubation duration and temperature-sex determination ratios for lizards, snakes, and tortoises.
Calculate ➜Reptile Clutch Size Estimator
Estimate expected clutch or litter size based on species, female weight, age, and previous breeding history.
Calculate ➜Frequently Asked Questions
Adult bearded dragons (18–24 inches) need a minimum 120-gallon enclosure (48″ × 24″ × 24″). Juveniles can be kept in 40–75 gallon tanks temporarily, but should be upgraded by 12 months. Our Terrarium Size Calculator gives exact minimum dimensions for 40+ species including geckos, monitors, tortoises, and boa constrictors.
Juvenile bearded dragons (under 12 months) should eat 60–80% protein (live insects) and 20–40% greens, fed 2–3 times daily. Adults flip to 20% protein and 80% plant matter, fed once daily. Portion size is roughly the space between the eyes for insects. Our Bearded Dragon Feeding Calculator gives exact quantities and dusting schedules based on your dragon’s current age and weight.
A safe prey item should be no wider than the widest point of your snake’s body — typically 10–15% of the snake’s body weight. Feeding too large a prey item risks regurgitation and stress. Our Snake Prey Size Calculator converts your snake’s current weight into the correct feeder rodent size (from pinky mice to jumbo rats) and recommended feeding interval.