TortoiseCalc
Enter your tortoise's shell length, life stage, and housing type to get a minimum floor-area guideline based on commonly cited tortoise-keeping rules of thumb — before you buy or build the enclosure.
Tortoise Enclosure Size Calculator
Calculate minimum enclosure floor area from shell length, tortoise count, and housing type.
Tortoise Growth Rate Checker
Compare your tortoise's current shell length at its age against commonly-cited growth ranges for sulcata, Hermann's, and Russian tortoises.
Tortoise Basking Lamp Wattage Calculator
Get a starting-point basking bulb wattage range from species, enclosure size, room temperature, and bulb distance.
Tortoise Soak Frequency & Water Depth Calculator
Get a starting-point soak frequency, duration, and water depth from life stage, species, housing, and shell height.
Tortoise Outdoor Pen Fence Height & Burial Depth Calculator
Get a starting-point fence height and burial depth from species group and adult shell length before you build an outdoor pen.
About TortoiseCalc
TortoiseCalc is a free enclosure size calculator for pet tortoise and box turtle keepers. Enter shell length, tortoise count, life stage, and housing type to get a minimum floor-area guideline before buying a tank, table, or building an outdoor pen.
The calculator runs entirely in your browser — no account, no data leaving your device. Share a result by URL, or bookmark it to recheck as your tortoise grows.