Gallons and liters are the most common units used to measure gasoline volume. A gallon is a key component in fuel efficiency and capacity for automobiles in the U.S. The liter is its metric counterpart, used in most other countries. If you want to compare gas prices in the U.S. and Canada, for example, you can convert the U.S. price for a gallon of gas to its equivalent price for a liter of gas by using a standard conversion formula.
Find the price for a gallon of gas. For an example, the price of gallon of gas is $3.50.
Convert one gallon into a liter measurement. A gallon equals 3.78541178 liters.
Divide the price per gallon by the number of liters in a gallon. For example, dividing 3.50 by 3.78541178 equals 0.924602184. The price of gas is around $0.92 per liter.
You can also multiply the price of gas per gallon by 0.264 to calculate price per liter.