Quick Answer
Browse turtle growth charts and weight ranges below. Use our breed-specific charts to track if your pet is on target.
🐢
5-50 yrs
Growth period
💧
10 gal/inch
Tank rule of thumb
♀️
Females
Often larger
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Shell
Measured by length
📏Growth & Size Facts
Tank Upgrade
Plan for the ADULT size. Buying a 10-gallon tank now means buying a 75-gallon one later.
Slow Growers
Tortoises grow slowly but steadily for decades. Sulcatas can reach 100lbs+.
Pyramiding
Lumpy shell growth is permanent and caused by poor humidity/diet during growth phases.
Sexual Dimorphism
In many aquatic turtles, females grow much larger than males.
Frequently Asked Questions
How big do Red-Eared Sliders get?
Males reach 7-9 inches, but females can grow to 10-12 inches.
Do turtles grow to the size of their tank?
MYTH. They will grow until they are stunted, sick, and deformed. A small tank does not limit healthy growth.
More Turtle Resources
Track Your Pet's Growth
Create a free profile for your turtle to log weight checks, set reminders, and see personalized growth charts.
Start Tracking FreeTrusted sources: AKC Breed Standards · AVMA Pet Care