Fill in the fields (except the third field which is
When you hit the tab key the third field will be recalculated.
I didn't write this converter — my math skills are far too inadequate for that! As far as I remember the author was someone on the Conlang email list. I just changed it to use base 12, as in Quenya, as default value and put it up here on my site, so that everyone can use it — including me when away from home!