Estimate a tree's age using trunk circumference or diameter, tree species, growth factor, and tree condition. This tree age calculator uses DBH, diameter at breast height, to estimate the age of standing trees without cutting them down.
Diameter method:
Enter the trunk diameter, choose a tree species or growth factor, and the calculator multiplies diameter by the growth factor.
Circumference method:
Enter trunk circumference and the calculator converts it to diameter using circumference divided by π.
Condition adjustment:
The calculator can adjust the estimate for faster open-area growth, slower forest growth, or poor soil conditions.
Age range:
Because tree growth varies, the calculator also shows a low and high estimated age range.
A tree age calculator helps estimate the age of a living tree without cutting it down or counting growth rings.
It can be useful for homeowners, gardeners, arborists, nature projects, forestry education, landscaping, tree records, and estimating the age of large shade trees.
Your result shows estimated tree age, trunk diameter, trunk circumference, growth factor, adjusted age, low age estimate, high age estimate, and the measurement method used. The result is an estimate because tree growth depends on species, climate, soil, sunlight, water, crowding, disease, pruning, and local growing conditions.
Measure the trunk diameter about 4.5 feet above the ground, then multiply the diameter in inches by the tree species growth factor.
DBH means diameter at breast height. It is usually measured about 4.5 feet above the ground.
No. It gives an estimate. The only way to know the exact age of many trees is to count growth rings, but that usually requires a cut stump or core sample.
Tree species grow at different speeds. Fast-growing trees usually need a lower factor, while slow-growing trees usually need a higher factor.