Tree Diameter Calculator
Calculate the trunk Diameter at Breast Height (DBH) from circumference or ground-level diameter measurements.
Input Parameters
Enter details for calculation.
Trunk Diameter (DBH)
Tree Basal Area
Expert Tip
DBH measurements should always be taken 4.5 feet (1.37 meters) above ground level on the uphill side of the tree.
Calculation Methodology & Details
Formula
For ground measurement mode, standard breast height is defined as 4.5 feet in imperial units and 1.3 meters in metric units.
Important Disclaimer
The calculations provided are for educational and general planning guidelines only. They do not replace professional forestry or anatomical analysis or certified advice.
How DBH is Calculated
Diameter calculations depend on field measurements:
Select Method
Use direct tape Circumference or Ground-Level Diameter with a taper factor.
Enter Values
Input measurements in either metric (cm) or imperial (inches).
Solve DBH & Area
The tool extracts the linear DBH and computes basal area automatically.