Liters to Gallons Converter (L to gal)

Convert liters (L) to US liquid gallons (gal) accurately and instantly with this free volume calculator. Ideal for calculating vehicle fuel capacity, chemical dilutions, aquarium tank volumes, brewing recipes, and everyday international liquid measurements.

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How to use this converter

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1. Enter the volume in liters into the input field.

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2. Confirm that Liters (L) is selected in the “From” dropdown.

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3. Confirm that Gallons (US) is selected in the “To” dropdown.

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4. The converted volume in US liquid gallons displays instantly in the result area.

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5. To convert back from gallons to liters or switch to milliliters or cubic meters, simply choose your desired units in the selectors.

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Liters to gallons formula: US vs. Imperial

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When converting liters to gallons, it is essential to distinguish between the US liquid gallon and the British Imperial gallon:

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1. US Liquid Gallon (Standard):
nDefined legally as 231 cubic inches, one US liquid gallon equals exactly 3.785411784 liters. This is the primary standard used across the United States and this converter.

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Formula:
US Gallons = Liters × 0.264172 (or Liters / 3.785411784)

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2. Imperial Gallon (UK, Canada, Commonwealth):
nThe Imperial gallon, historically used in the United Kingdom and Canada, is defined as exactly 4.54609 liters (~20% larger than a US gallon).

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Formula:
Imperial Gallons = Liters / 4.54609

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Everyday volume conversion examples

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• Standard 2-liter soda bottle: 2 L / 3.78541 = 0.528 US gallons.

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• Office water cooler jug (18.9 L): 18.9 L / 3.78541 = 5.0 US gallons.

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• Small car fuel tank (45 L): 45 L / 3.78541 = 11.89 US gallons.

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• SUV or truck fuel tank (70 L): 70 L / 3.78541 = 18.49 US gallons.

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• Large home aquarium (200 L): 200 L / 3.78541 = 52.83 US gallons.

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Liters to US gallons conversion table

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Common mistakes to avoid

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• Confusing US liquid gallons with Imperial gallons: If you use a British recipe or vehicle fuel guide, calculating fuel with the US factor (3.785 L) instead of the Imperial factor (4.546 L) produces an error of over 20%.

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• Mixing up fuel economy metrics (MPG vs L/100km): Miles per gallon (MPG) is an inverse ratio compared to Liters per 100 Kilometers (L/100km). A lower L/100km rating indicates superior efficiency, whereas a higher MPG rating indicates superior efficiency.

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• Dry gallons vs. liquid gallons: In agricultural contexts, the US dry gallon equals 4.40488 liters. For liquids (water, milk, gasoline), always use the liquid gallon (3.78541 L).

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Frequently asked questions

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How many gallons are in 1 liter?

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One liter equals approximately 0.264172 US liquid gallons (about one-fourth of a gallon). Conversely, one US gallon contains 3.78541 liters.

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How many gallons is 50 liters of gas?

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50 liters of gasoline equals approximately 13.21 US gallons (50 / 3.78541). For an Imperial gallon vehicle, 50 liters equals about 11.0 Imperial gallons.

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What is the quick mental trick to convert liters to gallons?

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A convenient mental estimation rule is to multiply the liter amount by 2 and divide by 8 (or divide liters by 4 and add about 5%). For example, 40 L divided by 4 = 10; adding 5% gives ~10.5 gallons (exact is 10.57 gal).

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Is a liter smaller than a gallon?

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Yes. A liter is significantly smaller than a gallon. It takes nearly four full liters (3.785 L) to fill one US liquid gallon container.

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Related volume and liquid converters

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• Gallons to Liters Converter – Convert US liquid gallons back into liters.

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• All Volume Converters – Convert cubic meters, fluid ounces, milliliters, cups, and pints.

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• Pounds to Kilograms Converter – Calculate water weight where 1 liter of pure water weighs 1 kg (2.205 lbs).

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• KPH to MPH Converter – Complement your international road trip calculations.

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