๐พ Pets
Turtle Tank Size Calculator
The standard guidance is ten gallons of water per inch of shell length for the first turtle, with more for each additional one. Turtles also grow far larger than pet shops suggest, and a red-eared slider can reach twelve inches across.
How it works
Shell length
Number of turtles
Species
Expected adult shell length
Minimum water volume now
Water volume as an adult
Minimum tank length
Basking platform area
Note
Frequently asked questions
How do I use the Turtle Tank Size Calculator?
Fill in the fields above โ the result recalculates instantly as you type. Everything runs in your browser, so the values you enter are never collected or stored.
Is this calculator free?
Yes. It is completely free, requires no account, and works on phones, tablets and desktops.