How to convert gallons to liters
- 1 Type a value in the gallons box; the litres appear as you type.
- 2 Or type in the litres box to convert the other way.
- 3 Choose US or UK (imperial) gallons.
- 4 Use the conversion table below for common values, or copy the result.
Fuel prices and economy
To compare a US fuel price with a price per litre, divide the price per gallon by 3.785. For fuel economy, 235.21 divided by US miles per gallon gives litres per 100 km; for UK mpg use 282.48 instead.
Distances in miles? Use Miles to KM. For litres back to gallons, use Liters to Gallons.
- A US gallon is about 3.8 litres, so a 5 gallon bucket holds about 19 litres.
- Imperial gallons appear in older British recipes, books and machinery manuals.
- When importing US equipment, check whether a capacity is in US gallons before converting.
- Cooking oil and engine oil are sold in litres in most countries but in quarts and gallons in the US, so convert before comparing prices.
Features
Both gallon types
US and imperial gallons in one tool.
Price per litre
Divide a price per gallon by the litres shown to get a price per litre.
Two-way
Type litres to get gallons.
When to use it
US fuel prices
A price of $3.50 a US gallon is about $0.92 a litre. Converting litres back? Use Liters to Gallons.
Aquariums
A 55 gallon tank holds 208.2 litres.
Paint and DIY
A 1 gallon US paint can is 3.79 litres; for room areas see Square Feet to Square Meters.
Fish tanks and pools
Aquarium and pool chemicals are dosed per gallon or per litre. A 10,000 gallon pool holds 37,854 litres, so convert before measuring chlorine.
Related Unit tasks
Frequently asked questions
How do I convert gallons to liters?
Multiply US gallons by 3.785411784, or UK gallons by 4.54609. 10 US gallons is 37.85 litres.
How many litres is 1 gallon?
3.785 litres for a US gallon and 4.546 litres for a UK gallon.
How many litres is half a gallon?
1.89 litres in US gallons, or 2.27 litres in UK gallons.
How do I convert miles per gallon to litres per 100 km?
For US mpg, divide 235.21 by the mpg. 30 mpg is 7.84 L/100 km. For UK mpg, divide 282.48 by the mpg.
How many litres is 55 gallons?
A 55 US gallon drum holds 208.2 litres.
How many litres in a gallon of milk?
A US gallon of milk is 3.79 litres; in the UK milk is sold in pints and litres.
Is a dry gallon different?
Yes, the rarely used US dry gallon is 4.405 litres; this converter uses the liquid gallon.
How many litres is 2 gallons?
2 US gallons is 7.57 litres; 2 UK gallons is 9.09 litres.
How many litres is a 20 gallon fish tank?
20 US gallons is 75.7 litres. Aquarium sizes from the US are almost always in US gallons.
How many litres in a quart?
A US liquid quart is a quarter of a US gallon, 0.946 litres; a UK quart is 1.137 litres.
Why does fuel economy look better in UK mpg?
An imperial gallon is larger, so a car travels further on it. The same car can show a higher miles per gallon figure in the United Kingdom than in the United States.
Why do recipes from America use cups instead of litres?
American kitchens traditionally measure by volume with cups, pints, quarts and gallons. A gallon holds sixteen cups, and each US cup is about two hundred and thirty-seven millilitres, so converting to litres or grams makes recipes easier to follow elsewhere.
Built and reviewed by Hamza Farooq, founder and lead developer
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