Choose a type of tree from the dropdown menu. Next, input the circumference of the tree. Then, select the measurement unit.
To calculate the age of a tree manually, we need to multiply the trunk diameter at breast (DBH) by the growth factor for that tree species.
Step 1: Measure the trunk’s circumference at chest height and divide by Pi (3.14) to get the diameter.
Step 2: Then, you multiply the tree’s diameter by the tree species’ growth factor1
See the table for growth factors used in this calculator:
https://docs.google.com/spreadsheets/tree-age-calculator-growth-factors/
