Tree age
Diameter at breast height
How to calculate a custom growth factor
Select the tree species, enter the diameter at breast height (DBH) and the growth factor. The calculator will then calculate the approximate age of the tree.
Tree age
Did you find an inaccuracy?
Our aim was to create calculators for wood professionals that provide the most accurate results possible. However, there are many coefficients, standards, deviations, and calculation methods that vary by country and local conditions, so it is not possible to cover all locations with 100% accuracy immediately. For some calculators, however, it is possible to enter custom parameters, such as wood densities or growth factors.
However, the system is designed so that we can refine it gradually, and we would appreciate your feedback, which will help us improve the calculators further and adapt them to practical use.
Growth factor
The growth factor is a multiplier used to estimate the age of a tree based on its diameter at breast height (DBH), measured 1.3 meters above the ground. It reflects how quickly a given tree species typically grows in diameter under average conditions. For example, a tree with a diameter of 30 cm and a growth factor of 2 would be approximately 60 years old. However, because growth rates can vary significantly depending on soil quality, climate and other local factors, it is recommended to calculate your own reference growth factor based on sample trees from the specific area for the most accurate age estimate.