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Tree Age Calculator — Free Online Tool
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Tree Age Calculator

Estimate tree age from trunk diameter at breast height

Formula: Estimated Age $\approx$ DBH (inches) $\times$ Species Growth Factor. For example, Oak growth factor is typically 5, Maple is 4.5, and Birch is 3.
Tree Measurements & Species

Calculation Results

⚠️ Tree age estimation using growth factors provides an approximation only. Actual growth rates vary significantly depending on local soil conditions, sunlight exposure, water availability, and urban competition. For precise dating, core sampling (increment borer) by a certified arborist is required.

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