Turtle Tank Size Calculator

Your details

Selects the adult maximum size and the correct gallon-per-inch multiplier. Choose "Other / Custom" for unlisted species.
Measure the straight-line length of the shell (SCL) from the front to the back. Do not use the curved length.
in
Each additional turtle adds 50% of the base volume requirement. Mixing species that compete or differ greatly in size is not recommended.
turtles
Toggle on to size the tank for the species maximum adult length instead of the current measurement. Recommended so you do not outgrow the setup.
Minimum tank volumeAdequate setup
60gal

Smallest acceptable aquarium for your turtle(s), in US gallons

Minimum volume (litres)227L
Ideal water depth10.5in
Basking area0.4sq ft
Shell length used6in
60 gal
Too small<29Minimum29-55Comfortable55-100Large species100+

Your turtle(s) need at least 60 gallons.

  • Minimum tank: 60 gallons for 1 Red-Eared Slider.
  • Water depth: at least 10.5 in so the turtle can flip itself if it rolls over.
  • Active swimmer; needs a powerful filter.
  • This species grows up to 12 in. An adult-sized tank would require about 120 gallons. Consider toggling "Size for adult length."

Next stepRemember that filtration for turtles must handle roughly 2-3 times the actual water volume, as turtles are heavy waste producers.

 = Powered by OnlyCalculators