Reptile Enclosure Size Calculator
Minimum enclosure dimensions for popular pet reptiles — bearded dragon, leopard gecko, ball python, and more.
Reptile Species & Enclosure Sizing
Select species and life stage to get certified minimum vivarium dimensions.
Minimum Recommended Dimensions
48" L × 24" W × 24" H
Central Bearded Dragon (Pogona vitticeps) • Adult Size: 18–24 in (45–60 cm)
Floor Footprint
8 sq ft
Enclosure Volume
~120 Gallons
Basking Surface
100–110°F (38–43°C)
UVB Target
Ferguson Zone 3
Recommended Material: Solid PVC or Wood (holds ambient heat, front opening glass)
Target Humidity: 30–40% (Desert)
Adults require at least a 4x2x2 ft (120 gallon) enclosure. A 40-gallon breeder is only acceptable for juveniles under 10 inches.
How it works
Modern veterinary and welfare guidelines (ARAV, RSPCA, ReptiFiles) exceed outdated '20-gallon minimum' rules. We calculate exact length × width × height, floor area (sq ft / m²), and internal volume based on adult body size, natural locomotion, and arboreal vs terrestrial climbing needs.
Examples
- Bearded dragon adultMin 48 × 24 × 24 in (120 gal)
- Leopard geckoMin 36 × 18 × 18 in (40 gal)