there was a great little utility posted awhile ago that did unit conversions anyone got the url?
Don't know which one you mean but there are a couple routines on my site related to unit conversion. One will take text with a number and make a copy of it with the value converted, and another that'll allow Imperial unit entry to any command and pass the metric equivalent to the command. If you have another handy converter in mind please post it when you find it.
Probably not the one you saw, but this one is OK. http://www.esbconsult.com.au/esbcalc/esbunitconv.html