This tab is where users can convert units of logged items, calculated values, and rolling calculations. This tab is not always necessary, as users can typically convert between units using the "output units" drop-down in the calculated values tab, but users can use this tab to do that as well. All that is needed is a new item name, the item that needs its units converted, and the desired units.
In this example, we are converting lbs to tons. As you can see, there is a selection of other units that can be chosen as well.