With gas prices on the rise the following calculator may be useful to some patrons. Bankrate has a calculator that show how far different vehicles will go on a tank of gas. You just need to enter in the cost per gallon and the rest is calculated. You can find it here.
Note: The first page that comes up is all pickup trucks. There is a pulldown menu that lets you select other vehicles. The Prius can be found under the category "compact sedans".