Tree Age Estimator
Dane
Press shift+enter to calculate
{{result.age}}
{{result.explanation}}

Usage

  1. Input the height of the tree. If you don't know the height, you can leave that field blank, but the estimation will probably be less accurate
  2. Provide the diameter at breast height (1.3 m) or the circumference of the tree at the height of 1.3 m.
  3. Choose the species form the dropdown list. To find one - just start typing.
  4. Click the estimate

Methods

Jan Łukaszkiewicz method

This methods is implemented only for Tilia cordata, Fraxinus excelsior and Aesculus hipocastanum. It is based on an assumption, that the tree's age is the exponential function of its diameter and height. The coefficients for the species where acquired by using linear regression on a 400 trees sample from Warsaw.

Age tables by prof. dr. Longin Majdecki

In his work prof. Lingin Majdecki stated an estimate age ranges for certain diameter ranges of many tree species. It is possible to get a more accurate estimation by linear interpolation between these ranges. The estimator returns both the range and interpolated value (if the calculation is possible).

Age table

by prof. dr. Longin Majdecki
Age [years]
Species 20 40 70 100 120
DBH [cm]
{{tree.name}} {{tree.ageTable[20]}} {{tree.ageTable[40]}} {{tree.ageTable[70]}} {{tree.ageTable[100]}} {{tree.ageTable[120]}}

Want to get the source code?

Github repo

Plots

These plots where made with ggplot2 R package, based on the age table by Longin Majdecki. A starting point for each plot is (0,5), because it is said that a tree needs about 5 years to get to the height of 1.3 m, where it is measured. All plots can be downloaded in one archive or one pdf in the downloads section.