Gallons-to-Liters Converter
Fast, accurate and free online galony litry converter tool running directly in your browser.
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Other tools you may find usefulGallon to liter converter - US gallon and UK gallon to meters
Gallon is a unit of volume mainly used in the US and UK. Note: US gallon ≠ Imperial gallon – the difference is approximately 20%. The tool converts both types of gallons to liters and other volume units.
Gallon types and conversions
US Gallon (liquid): 3.78541 liters. Used: USA, Puerto Rico, Liberia. US Gallon (dry): 4.40488 liters (rarely used). Imperial Gallon (UK): 4.54609 liters. Used: UK, Canada, Caribbean. Note: when buying a car from the UK – 40 mpg (UK) ≠ 40 mpg (US). Converter: 1 UK gal = 1.2009 US gal.
Derived units
1 US Gallon = 4 quarts = 8 pints = 16 cups = 128 fl oz. 1 Imperial Gallon = 4 quarts = 8 pints (UK pint = 568ml) = 160 fl oz (UK). US Cup = 236.6 ml. UK Cup = 284ml (standard cup method, but UK regulations 250ml). 1 US fl oz = 29.57 ml. 1 UK fl oz = 28.41 ml.
Uses of the Gallon Converter
Cooking: US recipes use cup and gallon. Car: fuel consumption mpg (miles per gallon). Aquarium: capacity in US gallons (e.g. "55-gallon tank" = 208 liters). Propane tanks: 5-gallon grill tank = 18.9 liters. Importing cars from the USA: calculate fuel consumption. Online shopping USA: chemical containers (gallon jugs).
Conversion table
1 US gal = 3.785 L. 2 US gal = 7.571 L. 5 US gal = 18.93 L. 10 US gal = 37.85 L. 1 UK gal = 4.546 L. 5 UK gal = 22.73 L. 55 US gal (drum) = 208.2 L. 1L = 0.264 US gal = 0.220 UK gal. 1 pint US = 0.473 L. 1 pint UK = 0.568 L.
Frequently asked questions
Why hasn't the US switched to meters and liters?
Trials: Metric Conversion Act 1975, but voluntary. Resistance: costs of changing infrastructure, habit. NASA tragedy: Mars Climate Orbiter (1999) crashed due to unit error - Lockheed used inches, NASA used meters. Fun fact: medicine, science and the US military use metric. Food: both have labels.
What does "miles per gallon" mean and how to convert?
MPG (miles per gallon): miles traveled per gallon. US standard. UK also uses MPG but UK gallon. Conversion to L/100km: (235.215 / mpg_US) = L/100km. E.g. 30 MPG US = 7.84 L/100km. UK MPG to L/100km conversion: (282.48 / mpg_UK). When comparing cars: always check whether the MPG is US or UK.
How big is a 55-gallon drum?
55 US gal = 208.2 L = standard industrial steel drum. Dimensions: approx. 57 cm in diameter × 88 cm in height. Empty weight: approx. 18 kg. Full of water: 226 kg. Usage: storage of chemicals, fuels, oils. Beer barrels: US keg = 15.5 US gal = 58.7 L. Half keg = 7.75 US gal = 29.3 L.
How to convert gallons to Polish units in the kitchen?
1 US cup = 236.6 ml (approx. 237 ml). Polish glass: approx. 250 ml (not identical!). 1 US tablespoon = 14.8 ml. 1 US teaspoon = 4.9 ml. Polish: spoon = 15 ml, teaspoon = 5 ml. For cooking: US cup ≈ Polish glass with a small correction. Weighing is more accurate than measuring volume.
Gallons in the oil and gas industry?
Crude oil: price per barrel. 1 barrel of oil = 42 US gal = 158.99 L. Not to be confused with industrial barrel = 55 US gal. Natural gas: BTU, MCF (thousand cubic feet). LPG (liquefied petroleum gas): sold in the US in gallons. Airplanes: jet fuel in US gallons or liters (varies by airport).
Related tools: ml to oz converter, kg to lb converter and cooking calculator.