Spike's Calculators


International ¼ Inch for Standing Trees using Metric Measurements

Spike VM

Approximate the volume of a tree in board feet using the International ¼ Inch log scale using metres for tree height and centimetres for the tree diameter measured @ breast height (1.37 metres)
Board foot value results are similar to the Girard form class 78 table.

This calculator uses the merchantable height of the tree measured from a 30 centimetres (0.3 metres) stump height to where main stem diameter equals a specified limit.

International ¼ Inch Rule for Tree BFM using Metric Measurements

Merchantable Tree Height in Metres m
Tree Diameter @ Breast Height cm


Board Foot Volume International ¼" bf


  1. enter the merchantable height of the tree in metres
  2. tree diameter measured at breast height in centimetres (breast height = 1.37 metres)


  1. International ¼ Inch board feet volume of the tree as reported for Girard form class78
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