Good places to find the current price of gas online include AAA's Fuel Gauge Report and the Energy Information Administration website. FuelEconomy.gov provides gas price information by linking visitors to other sites, such as Automotive.com and MapQuest.com.
AAA's Fuel Gauge Report lists the national average gas price daily and shows changes by week, month and year. The prices are based on the average cost of a gallon of regular gasoline. AAA surveys up to 120,000 gas stations every day to determine the average prices.
The Energy Information Administration offers weekly updates on the average price of gas by region. The site also lists average diesel fuel prices. FuelEconomy.gov provides links to other sites that list local gas price information.