Compare fuel prices quoted per gallon against per liter.
Convert one price to the other system using the liters per gallon constant, then compare both on the liter basis to find the cheaper fuel. Comparing pumped prices across borders or fuel types requires a common unit, and per-liter versus per-gallon differences hide real savings.
Fuel Price per Gallon vs Liter
gallon = liter x 3.78541; liter = gallon / 3.78541
gallon = liter x 3.78541; liter = gallon / 3.78541 Convert one price to the other system using the liters per gallon constant, then compare both on the liter basis to find the cheaper fuel.
Comparing pumped prices across borders or fuel types requires a common unit, and per-liter versus per-gallon differences hide real savings.
This calculator takes 2 inputs: Price per gallon, Price per liter. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.