The value entered in this field is used with the Operator to convert the unit of weight to the standard unit of weight (the unit that is listed first in the grid). There must be a known method of conversion for any unit of weight added to this table. This field is ignored for the first entry in the grid.
For example, if the first entry in the grid is "pound", if you want to enter "ounces" as another unit of weight, then you'd enter " / " (divide) in the Operator field, and 16 in the Conversion Factor field, because you must divide "pound" by 16 to get one ounce (because there are 16 ounces in a pound).
This field defaults to 1.0000. The valid range of numbers is from zero to 99999.9999.