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.

Circumference Centimeters (cm)

Required number input.

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

Dbh Centimeters (cm)

The resulting dbh 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.

• Basal Area Single Tree

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

• Height Diameter Ratio

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

• Taper Function Simple

  Linear stem-taper estimate above breast height, from measured DBH at 1.3 m to zero at total height.