gallons to liters converter

How to convert us gallons to liters

Multiply US gallons by 3.785411784 to get litres. One US gallon is exactly that many litres because it is defined as 231 cubic inches and the inch is 25.4 mm. Ten US gallons is 37.854 litres. An imperial gallon would be 45.461 litres, and this page will not produce that number. If the jug, the pump, or the statute says UK or imperial, multiply by 4.54609 instead. The shared factor table keeps both, under the names gal (US) and gal (UK).

A US recipe, a fuel receipt in gallons, or a pool chemical dose written per gallon when the pool volume was measured in litres. Five US gallons, a typical jerry can, is 18.927 litres. A 55 US gallon drum is 208.198 litres.

Exact formula

Formulaliters = US gallons × 3.785411784

liters = US gallons × 3.785411784 One gal is 3.785411784 L. Ten gal is 37.85411784 L. The worked example below uses that same conversion.

Conversion table

The us gallons column runs from 0.5 gal (1.893 L) through 2000 gal (7570.82 L).

Worked example: US gallons to Liters

One US gallon is 3.785 L. That constant is exact, not a rounded 3.8. Five US gallons, a typical jerry can, is 18.927 L. A 55 gallon drum is 208.2 L. An imperial gallon would be 4.54609 litres and this page will not produce it. The factor table keeps gal (US) and gal (UK) as separate units. Canadian labels have used both words. The mass of a gallon of water is about the same number of kilograms only because water's density is near 1. This page stops at litres.

Pitfalls for us gallons to liters

• Imperial gallons are larger. 1 imperial gallon = 4.54609 L, about 20 percent more than a US gallon.
• Fluid ounces in a US gallon are 128. That is how the millilitre page gets 29.5735295625 mL per US fl oz.
• A 'gallon' on a Canadian label is the imperial gallon in older text and often the US gallon in trade. Read the label.
• Mass of a gallon depends on the liquid. This page does not convert to kilograms.