๐ฑ Gardening
Tree Age Calculator
A tree adds roughly one growth ring per year, and ring width varies with species and conditions: a fast-growing poplar may put on half an inch of diameter a year while a slow oak adds less than a quarter inch. Measuring at chest height and converting through a growth factor gives a reasonable estimate.
How it works
Trunk circumference at chest height
Species
Growing conditions
Trunk diameter
Growth factor for the species
Estimated age
Plausible range
Trunk diameter
Frequently asked questions
How do I use the Tree Age Calculator?
Fill in the fields above โ the result recalculates instantly as you type. Everything runs in your browser, so the values you enter are never collected or stored.
Is this calculator free?
Yes. It is completely free, requires no account, and works on phones, tablets and desktops.