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Litres are the metric unit of volume; US gallons the imperial one. Fuel, water and container sizes cross between them, so this converter turns litres into US gallons and back.
How is it calculated?
The conversion factor
1 US gallon = 3.785412 litres, so 1 litre = 0.264172 US gallons.
| To convert | Do this |
|---|---|
| L → US gal | divide by 3.785412 |
| US gal → L | multiply by 3.785412 |
The UK (imperial) gallon is larger, at 4.546 litres.
Common values
| Litres | US gallons |
|---|---|
| 1 L | 0.26 gal |
| 10 L | 2.64 gal |
| 40 L | 10.57 gal |
| 100 L | 26.42 gal |
Worked example
A 40 L fuel fill is 40 ÷ 3.785412 = 10.57 US gallons. A 5 US gallon water bottle is 5 × 3.785412 = 18.9 L.
FAQ
How many US gallons is 1 litre?+
One litre is 0.264172 US gallons — about a quarter of a gallon. Divide litres by 3.785412 to get US gallons.
How do I convert litres to gallons?+
Divide the litre value by 3.785412 for US gallons. For example, 60 L ÷ 3.785412 = 15.85 US gallons.
Is this US or UK gallons?+
US gallons (3.785 L). The imperial (UK) gallon is larger at 4.546 litres — about 20% more — which matters for fuel-economy comparisons.
How do I convert gallons back to litres?+
Multiply US gallons by 3.785412. So 10 gal = 37.85 L.
How many litres in 5 US gallons?+
5 US gallons is 18.93 litres — a common large water-cooler size.