I'm starting a Rails project with a cooking recipe focus.  I was
wondering if anyone knows of a pre-existing library that will handle
the classic dry and liquid cooking conversions such as teaspoons to
tablespoons, tablespoons to cups, fluid ounces to pints, ounces to
pounds, etc.  Something like what Rails' ActiveSupport does with number
extensions would be nice, but this beggar isn't a chooser.

Thanks for your tips!