Convert between gallons and liters for gas, water, and beverages.
1 US gallon = 3.78541 liters.
Gas mileage is measured in miles per gallon (US) or L/100km (Europe).
Use this converter whenever you need to switch between measurement systems with confidence. Even familiar unit conversions carry rounding risk when done mentally — precision work requires the exact factor.
The most common conversion error is using an approximate factor recalled from memory rather than the exact conversion constant. For high-precision work, even small rounding differences in the conversion factor compound when applied to large values.
A cyclist travelling internationally needs to calibrate their bike computer from miles to kilometres. A single precise conversion ensures the display is accurate for the entire trip — the difference between 60 miles and 96.6 km matters when tracking training load.
1 US gallon = 3.785 liters.
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