Use this forestry calculation to summarize a measured tree, plot, canopy, fuel, biomass, carbon, growth, density, or wood-volume quantity under a stated inventory convention.

Over Bark Dbh Centimeters (cm)

Required number input.

Under Bark Dbh Centimeters (cm)

Required number input.

Average radial bark thickness at breast height from over-bark and under-bark diameters. The tool evaluates the supplied inputs together and returns the named outputs below; it does not infer omitted operating conditions or change the units shown.^[1]

Bark Thickness Centimeters (cm)

The resulting bark thickness centimeters returned as a number.

• Inventory summaries depend on breast-height definition, inclusion threshold, plot design, bark treatment, slope correction, damaged stems, measurement error, and expansion weights. Arithmetic and basal-area-weighted means answer different questions.
• Use finite inputs in the displayed units and preserve more precision than the final presentation requires. Independently verify safety-critical, financial, compliance, or production decisions.

Use locally validated equations and inventory protocols, retain species and measurement metadata, aggregate with appropriate plot expansion and sampling weights, and report uncertainty with stand-level results.

• Bark Volume Percentage

  Approximate bark volume percentage from squared over- and under-bark diameter ratio, assuming identical taper.

• Basal Area Single Tree

  Tree stem cross-sectional basal area at breast height in square metres from DBH in centimetres.

• Dbh From Circumference

  Diameter at breast height in centimetres from stem circumference at the same measurement height.