Volume is tricky because the same name means different amounts in different countries. A US gallon is about 3.785 litres, while a UK imperial gallon is about 4.546 litres, roughly 20% larger. US and UK fluid ounces and pints differ too, so a recipe or fuel figure from the wrong country can be noticeably off. This converter offers litres, millilitres, US gallons, quarts, pints, cups, fluid ounces and cubic feet. One litre equals 1,000 cm³, and one cubic metre is 1,000 litres. There is no separate UK-gallon option, so convert UK measures from a reliable source before using the result.
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