How to Use the Tree Age Calculator
Estimate living tree age non-destructively:
Measure Circumference
Wrap measuring tape around trunk 4.5 ft (1.37 m) above ground level.
Calculate DBH
Engine converts circumference to Diameter at Breast Height (DBH = C / π).
Select Tree Species
Choose species growth factor (Oak, Maple, Pine, etc.).
View Age Estimate
Inspect estimated tree age in years.
Key Features & Arboriculture Science
ISA Growth Factor Index
Based on International Society of Arboriculture (ISA) dendrochronology constants.
Non-Destructive Estimation
No increment borer coring or cutting required.
100% Private Client Compute
Runs in browser memory with zero tracking or server logs.
Forestry Guide: Dendrochronology & Tree Age Determination
Dendrochronology is the scientific study of tree growth rings. For living urban or forest trees, arborists estimate age by measuring Diameter at Breast Height (DBH) and applying species-specific growth factors.
Frequently Asked Questions
?What is DBH in tree measurement?
DBH stands for Diameter at Breast Height, measured 4.5 feet (1.37 meters) above ground level.