Turtles
Aquatic turtles and land tortoises — chelonian age and lifespan calculators.
Species in this group
12Aldabra Giant Tortoise
How old is your Aldabra Giant Tortoise in human years?
Asian Box Turtle
How old is your Asian Box Turtle in human years?
Eastern Box Turtle
How old is your Eastern Box Turtle in human years?
Galápagos Tortoise
How old is your Galápagos Tortoise in human years?
Greek Tortoise
How old is your Greek Tortoise in human years?
Hermann's Tortoise
How old is your Hermann's Tortoise in human years?
Indian Star Tortoise
How old is your Indian Star Tortoise in human years?
Leopard Tortoise
How old is your Leopard Tortoise in human years?
Painted Turtle
How old is your Painted Turtle in human years?
Russian Tortoise
How old is your Russian Tortoise in human years?
Sulcata Tortoise
How old is your Sulcata Tortoise in human years?
Red-eared Slider
How old is your Red-eared Slider in human years?
About turtles and tortoises
Turtles and tortoises (chelonians) are among the longest-lived pets. A red-eared slider turtle lives 20-40 years, while tortoises like the Aldabra and Galápagos can live 100-150+ years and outlive multiple human generations. Aging in chelonians is extremely slow — a 30-year-old tortoise is a young adult. Understanding chelonian age in human-equivalent years matters for planning long-term care, succession, dietary changes, and recognizing when a turtle is finally entering senior life.
Lifespan range in this group
Aggregated from individual species in this group. Indoor, well-cared-for animals typically reach the upper end.
Common care tips for turtles and tortoises
- Provide species-appropriate UVB lighting (especially for tortoises) and full-spectrum basking heat; replace UVB bulbs every 6-12 months.
- For aquatic turtles, maintain pristine water with strong filtration; use a basking dock with dry land area for thermoregulation.
- Feed a species-correct diet — herbivorous tortoises need leafy greens and hay, while aquatic turtles need protein plus aquatic plants.
- Find a chelonian-experienced ARAV vet; annual exams catch shell rot, respiratory infection, and parasites early.
- Plan for long-term care — large tortoises commonly outlive their owners. Include them in your estate or rehoming plan.
FAQ
How long do pet turtles and tortoises live?
Red-eared sliders 20-40 years, box turtles 40-100 years, Russian tortoises 40-50 years, sulcata tortoises 70-100 years, Aldabra and Galápagos tortoises 100-150+ years.
What is the longest-living chelonian?
Aldabra and Galápagos tortoises hold the record — many documented over 150 years, with some individuals approaching 200. Always plan succession care.
When is a turtle or tortoise a senior?
Chelonians age extremely slowly. Sliders are seniors past 25 years, sulcatas past 50 years, Aldabras past 100 years.
How do I estimate the age of an adopted turtle?
Count growth rings on the scutes (rough estimate, not exact), measure shell length, and consult an ARAV vet. Calculate human-equivalent age to plan life-stage care.
Do turtles need UVB lighting?
Yes — almost all chelonians require UVB to metabolize calcium and prevent shell deformities. Aquatic turtles need it too, despite being in water.