Dear All, I see that 'Scale finder' will not work with versions of Windows later than XP. After a quick search, I cannot find anything similar, only descriptions of how to work things out with pencil and paper, or something for converting representative fractions to X inches = 1 mile. I need to be able to work from inches/miles to get the representative fraction as well. The possibility that something easy might exist, makes me shun the pencil and paper approach until I have consulted this group. Is there anything else? Best wishes, David.