About this tool
Convert any volume between US and Imperial gallons, quarts, pints, cups, fluid ounces, litres, millilitres and cubic units, instantly and entirely in your browser. The classic case — gallons to litres — is the default. Note that US and Imperial (UK) gallons are different sizes, so both are offered separately.
Frequently asked questions
How many litres are in a gallon?
One US gallon is 3.785411784 litres. One Imperial (UK) gallon is larger, at 4.54609 litres. Pick the right gallon for your region.
What's the difference between US and Imperial units?
The US and the UK define gallons, quarts, pints and fluid ounces differently — an Imperial gallon is about 20% bigger than a US gallon. This tool lists both so you don't mix them up.
Are these liquid or dry measures?
These are liquid (fluid) volume measures. US dry pints and quarts are different and aren't included here.