This is a piece of freeware that's been floating around for years. I love it. It converts between scales, calculates enlargement/reductions, computes scales from measurements- it's just great!
Kudos to Frank Crenshaw, the author!
http://www.warshipmodels.com/~users/mog ... lecalc.exeFYI- There is nothing wrong with the file- it's not infected, nor is it any sort of malware. It started showing up as a "false positive" in mid-2009. Most virus scanners fix this with later updates; your results may vary.