A lot of people would tell you that you know how old a turtle is by counting the boxes on its shell, but it isn't true. I guess the only way to know is to know when it was born. To check it out yourself, you can go to www.yourturtle.wetpaint.com
:)
count the circils on his or her back
There is no way to tell how old a sea turtle is or even how long they live. The best estimate is that they can be up to eighty years old when they die. There are no rings or lines on a turtle shell that increase with age to tell how old the turtle is. A typical sea turtle reaches breeding age around 25-30 (for loggerheads). After a turtle does become an adult, it is anyone's guess how old it is.
look on google images or determine the sizeof the turtle and stop listening to wiki answers they lie
if they are wild its most likely to tell their age but if it isn't wild if don't think you'll have a good chance of telling its age. hope this answers your question
It matters on the turtle's age...
The gender of a turtle does not affect the age of the turtle. You can tell the age of your turtle by looking at the layers on the turtles scute. Scutes are what makes a turtles shell look quilted. Each scute sheds about once a year, revealing a new scute and leaving a layer on the new scute. By seeing how many layers are on a scute you can tell how many years old your turtle is. Example. 2 layers = 2 years, 10 layers = 10 years. A turtle with no layers will be less than a year old.
how can you tell the difference between a tortoise and a turtle by shell in picture
A yellow back turtle or yellow-bellied slider is an aquatic terrapin which has evolved to live in warm waters. There is no definitive way in determining how old it is and the rings on its shell are not conclusive in gauging its years of age.
Most turtles mature at the age of 2-4 years so look on the turtles scutes and see how many layers there are. Each time a scute sheds a new layer appears, turtles shed about once a year, so by reading the layers you can tell the age of your turtle. Turtles 2-3 years and less are juveniles. Turtles 4-5 years and more are adults.
The only way to really be sure of a box turtle's age is to be present at the hatching. Determining age by the hexagonal lines on the plates of the shell (scutes) is not reliable.
Look for a wedding band.
you need to be the civilization that has turtle ships