Log Volume Calculator
The volume of a round log cannot be calculated by the general formula for
calculation of the volume of a cylinder because the log tapers from one end to
the other. The circular area of one end of the log is different from the
circular area at the other end. This would require the measurement of the
diameter at both ends as well as the length of the log. The mean radius can then
be found by adding the two diameter measurements and dividing by 4. The volume
of the log can then be calculated from the formula:
V = (22/7)*((D1+D2)/4)2)*L
However, this would require three measurements to be taken each time.
This task can be shortened by taking only two measurements. The length of the
log and its girth at the centre.
If g is the girth at the centre in inches and L is its length in feet then the
volume of the log V in cubic feet is given by the formula.
V = (g/12)2*L/(4*p)
Calculating the volume of many logs using this formula can be a tedius process.
Therefore, a Microsoft Spreadsheet containing a table (shown below) that will
automatically calculate the volume of each log by entering the length of the log
and its mid-girth can be downloaded. It will also give the total volume of all
the logs (within limit of 28 logs). The yellow column contains the formula for the calculation and the figures in this column must in no case be deleted.
To download the spreadsheet for only US$5 click the BUY NOW button below: