A trees growth rate changes in a predictable pattern throughout the year in response to seasonal climate changes, resulting in visible growth rings. Each ring marks a complete cycle of seasons, or one year, in the trees life.

Do tree rings really tell age?

Rings of trees growing in temperate climates can indeed tell their age through their annual rings and also help determine the age of wood used to construct buildings or wooden objects. Concentric rings of various widths mark the annual growth of trees.

How old is a tree with 24 rings?

Divide the radius by the average ring width. Divide 24 (or 60.96) by 0.20 (or 0.508) to come up with an estimated age of 120 years.