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:

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.

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: