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Log Volume Measurement in Ireland

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Measurement of round timber for sale purposes in Ireland.
The volume of Irish logs is calculated using Huber's formula.

Diameters are measured mid-length of the log over bark in centimetres (cm)
Lengths are measured in metres (m) to the nearest centimetre.
A log whose length is greater than 20 metres has to be divided into two lengths for the purpose of calculating the log volume.

Huber's Formula:
V = (π  * Dm²) ÷ 40000 * L
V = volume in cubic metres (m³)
π = 3.1416
Dm = mid-diameter (diameter of a log at exactly half its length) in centimetres
L = length in metres

Or in a simpler form:
V = Dm² * L * 0.00007854
V = volume in cubic metres (m³)
Dm = mid-diameter (diameter of a log at exactly half its length) in centimetres
L = length in metres
0.00007854 = π ÷ 40000

Ireland-Diameter Overbark

Length of Log in Metres m
Diameter Mid Length Log cm

Results:

Log Volume in Cubic Metres

Calculation

  1. length of log in metres (m) to the nearest centimetre
  2. the diameter measured mid-length "outside bark" in centimetres

Result

  1. log volume in cubic metres


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