Gallons to Liters Converter

Convert US liquid gallons to liters (L) for fuel, containers, recipes, aquariums, and storage capacity.

One US liquid gallon equals exactly 3.785411784 liters. This page defaults to the US gallon; select Imperial gallon from the unit menu when working with UK measures.

How to use the converter

Choose a measurement category and two units, then enter any finite positive or negative value allowed by that measurement. Adjust decimal places when the result needs more detail. Swap Units reverses the direction without discarding the current value.

Available unit converters

Length · Area · Volume · Weight · Temperature · Speed · Pressure · Energy · Power · Data Storage · Frequency · Time · Angle

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Calculations run locally. Display precision only changes the visible result; the converter keeps the full JavaScript numeric value for the next calculation.