Tree Value Calculator

A log rule needs the small end of a bucked log, and a standing tree offers only a diameter at breast height and a guess at how far up the stem is usable. Girard form class bridges the two: it fixes the diameter at the top of the first 16-foot log, and a constant taper carries the stem up from there, so every log can be scaled on its own small end. Enter the diameter, the merchantable height in logs and a price per thousand board feet, and you get the volume and the value under all three rules, with the logging cost taken off for a stumpage figure. A second tab does the same for a whole tally of marked trees.

Calculator Type
Measured with a tape at 4.5 feet above the ground on the uphill side.
How far up the stem is usable, counted in 16-foot logs. Halves are allowed: 2.5 means two logs and a half log.
The diameter inside bark at the top of the first log as a percentage of DBH. 78 is the standard assumption; a fat, fast-tapering tree runs nearer 72 and a tall, cylindrical one nearer 84.
Between 1.5 and 2.5 inches covers most straight timber. Open-grown trees taper faster.
From the mill quote or the forester. Leave at zero to get the scale without the money.
Fill this in and the stumpage, what is left for the landowner, appears alongside the delivered value.
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Separate the numbers with x, commas or spaces. Leave the count off and it is taken as one tree.
The diameter inside bark at the top of the first log as a percentage of DBH. 78 is the standard assumption; a fat, fast-tapering tree runs nearer 72 and a tall, cylindrical one nearer 84.
Between 1.5 and 2.5 inches covers most straight timber. Open-grown trees taper faster.
From the mill quote or the forester. Leave at zero to get the scale without the money.
Fill this in and the stumpage, what is left for the landowner, appears alongside the delivered value.
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