About Gallon and Liter Conversions

Gallons and liters are essential volume units used worldwide. The US gallon (231 cubic inches) is different from the UK imperial gallon (277.42 cubic inches), making conversions important for international recipes, fuel economy calculations, and scientific measurements.

Conversion Formulas

1 US gallon = 3.785411784 liters
1 UK gallon = 4.54609 liters
1 liter = 0.264172 US gallons
1 liter = 0.219969 UK gallons

Practical Examples

US recipe: 2 gallons of milk = 7.57 liters
UK fuel economy: 40 mpg (UK) = 8.48 liters/100km
Aquarium size: 50 US gallons = 189.27 liters

Frequently Asked Questions

Why are US and UK gallons different?

The US gallon is based on the wine gallon (231 cubic inches) from 1707, while the UK gallon is based on the imperial gallon (277.42 cubic inches) established in 1824.

Which gallon is used in Canada?

Canada officially uses the metric system (liters), but historical references might use US gallons due to proximity to the US market.

Are these conversions exact?

The conversion factors are standardized and exact, but real-world measurements may have slight variations due to temperature and measurement techniques.

Gallons to Liters Converter

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Gallons to Liters Converter US and UK

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