CANOPYKEEP
How old is my tree?
Not sure?
inches around
All the way around, 4½ ft up. If it splits lower, measure the thickest stem.
Already know the diameter?
inches across (DBH)
To count the rain that fell there.
Examining the symptom...
Symptom Photo
Leaf spots, bark damage, bugs, fungus.
That's my limit for now. Want to keep this read?
Email it to me →
Email it to me →
Find an arborist
We'll connect you when one is available in your area.
We'll be in touch when an arborist is near you.
How can I tell how old a tree is without cutting it down?
Measure around the trunk at 4½ feet up, divide by π for the diameter, and run that through growth curves for the species. No coring, no counting rings.
How fast does a tree grow?
Depends on the species and on where it stands. The same red oak puts on twice the trunk in Georgia that it does in Minnesota — which is why this asks where the tree is first.
How accurate is a tree age calculator?
Most multiply diameter by a single growth factor. This runs the USDA Urban Tree Database — measured street and park trees, the data behind i-Tree — so read it as a range, not a number.