Liters to Gallons: Fuel Economy and Liquid Conversions

    Master liter-to-gallon conversions with practical applications for fuel economy comparisons, cooking, and daily life.

    Use the Liters ↔ Gallons

    Convert between liters and gallons

    US vs Imperial Gallons

    Before converting anything, you need to know which gallon you are dealing with. A US gallon equals 3.785 liters. A UK (imperial) gallon equals 4.546 liters, making it about 20 percent larger than its American counterpart. This distinction matters enormously when comparing fuel economy figures from different countries.

    Example: A car rated at 30 miles per US gallon achieves 36 miles per imperial gallon with the same amount of fuel.

    Fuel Economy Conversion

    The United States measures fuel efficiency in miles per gallon (MPG), where a higher number means better efficiency. Most other countries use liters per 100 kilometers (L/100km), where a lower number means better efficiency.

    Example: A car rated at 30 MPG uses 235.21 / 30 = 7.84 L/100km.

    Everyday Liquid References

    Having a feel for common volumes in both liters and gallons helps with everyday estimates.