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.

Trees Per Hectare (1/ha)

Required number input.

Quadratic Mean Dbh Centimeters (cm)

Required number input.

Reineke stand density index using 25.4 cm reference DBH and 1.605 exponent. 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]

Stand Density Index (1/ha)

The resulting stand density index returned as a number.

• Density, spacing, stocking, and plot-expansion metrics depend on species or stand model, plot area, edge correction, diameter threshold, spatial pattern, and reference maximum. They are not interchangeable measures of competition.
• 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.

• Relative Density

  Observed stems per hectare as a percentage of a supplied reference stand density.

• Arithmetic Mean Diameter

  Arithmetic mean DBH in centimetres from summed diameters and measured tree count.

• Basal Area Growth Annual

  Average annual stand basal-area change in square metres per hectare.