top of page

Formulas for Estimating Tree Ages

A well-known tree expert, M. W. Staples of Kent Ohio, has been credited with developing guidelines for estimating the age of large trees.

The formula is as follows:

Tree diameter in inches multiplied by tree species multiplier = tree's approximate age.

Measure the circumference of your tree in inches at 4 ½ feet from the ground. Divide the result by 3.14 (π).
Then for the species you have selected, use the approximate multiplier as listed below to determine approximate age.

bottom of page