Easily convert between $ per US gallon and $ per litre and see if it's worth crossing the international border for gasoline!
Dollar value in the answer is in the same currency as that typed in, so don't forget to convert at the current rates. If you pay by credit card your provider may charge up to 2.5% conversion fee. Some US gas stations give a discount for cash transactions.
The Gas Price Converter also has conversions for MPG/litrePer100KM, US gallons/litres and Miles/kilometers.