A Rate is a quantity measured with respect to another measured quantity.

To add a new Rate to your list, press the blue "+" button in the lower right corner of the Rates overview page:

Items with "*" are required.

An example of top unit of measurement would be "Gallons" in the rate "Gallons/Acre"

An example of the bottom unit of measurement would be "Acre" in the rate "Gallons/Acre"

The bottom factor defaults to "1.0". In the above example of Gallons/Acre technically this rate is Gallons/1.0 Acre. So if you are wanting to achieve something like "Fluid Ounces/100 Gallons" you would set the top unit of measure to "Fluid Ounces", the bottom unit of measure to "Gallons", and the Bottom Factor to "100.0"

This is the generated name that you will see in your pick lists for this rate.