How the conversion works
1 × 3.785411784 = 3.78541 L. The quick answer is rounded for readability; use the live calculator below for another value or more precision.
1 gallon to liters
Convert 1 US liquid gallon to liters.
Quick reference
3.78541 L
1 US gal → liters
When this is useful
Volume conversions are useful for recipes, liquid containers, tank capacities, product specifications and measurements that mix liters, milliliters, cubic units and gallons.
Quick comparison table
Compare the current answer with nearby or reverse values from the same converter family. Open any row to keep the units preselected and change the number.
Convert another value
3.78541178 L
1 gal
Volume uses US liquid gallons for “gal”. Imperial gallons use a different factor.
A quick note before you use the number
“gal” in this calculator means US liquid gallon. An imperial gallon is a different size, so do not substitute one standard for the other.
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