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 Diameter Centimeters (cm)

Required number input.

Under Bark Diameter Centimeters (cm)

Required number input.

Approximate bark volume percentage from squared over- and under-bark diameter ratio, assuming identical taper. 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 Volume Percent (percent)

The resulting bark volume percent returned as a number.

• Tree-volume estimates depend on diameter locations, length, bark convention, taper, form, defects, species, moisture, and merchantability rules. Huber, Smalian, Newton, and simple form-factor methods can differ for tapered or irregular logs.
• 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 Thickness Breast Height

  Average radial bark thickness at breast height from over-bark and under-bark diameters.

• Crown Ratio

  Live crown length as a percentage of total tree height.

• Height Diameter Ratio

  Dimensionless tree slenderness from height in metres divided by DBH converted from centimetres to metres.