Currently, looking up a Weight and Measures <Thing...> reference in Factbook (from the context menu in a resource) provides a section like this:

It just would be a nice enhancement if it were followed by a link to the Weights and Measures Converter interactive. This of course, would be also great for any interactive. Have a section that queries Interactives and Tools and produce results whenever there are some. For instance, when looking up a person, have a link to the Timeline.