Volume Unit Converter

Convert liters, gallons, cups, fluid ounces and more volume units.

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How to use

Enter a value and convert between 9 volume units.

How many ml in a US cup?

240 ml. A US fluid ounce is 29.57 ml; a US gallon is 3.785 liters.

US vs UK gallon?

A UK gallon is 4.546 liters — about 20% bigger than the US gallon.

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