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.

Reference Trees Per Hectare (1/ha)

Required number input.

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

Relative Density Percent (percent)

The resulting relative density percent 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 Spacing Index

  Mean tree spacing as a percentage of dominant height, using sqrt(10000/N) for N stems per hectare.

• Basal Area Growth Annual

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

• Stand Density Index Reineke

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