TripCost is a gas price calculator created to give those traveling in any country an easy way to calculate the cost of gas for a one-way trip. To get started enter the city you're traveling from and the city you're traveling too, as well as your average MPG. You can adjust the gas price and miles per gallon to get different results and use zip codes and airport codes as destinations. i.e. San Francisco, CA (SFO) to Boston, MA (BOS). The end result is a detailed summary of gas costs, a map to give a nice visual, and driving directions in case you needed those too ;)