About the Volume Converter
Volume is the unit family with the most traps, because the United States and the United Kingdom kept different gallons. A US gallon is 3.785 litres while an imperial gallon is 4.546 litres, roughly 20 percent larger, and the pints and fluid ounces built on them differ in the same way. This converter labels every unit with its system so you always know which one you are reading.
Typical uses are comparing fuel economy between countries, scaling drink recipes, working out the capacity of a tank or an aquarium in litres from dimensions given in gallons, and translating bottle sizes. For kitchen work with cups and spoons the dedicated cooking converter has a friendlier unit list.
How to use the Volume Converter
- Enter the volume you want to convert.
- Choose the source unit, taking care to pick the US or imperial variant where it matters.
- Choose the target unit and read the result, or scan the full table below.