CALCULATOR · Converters
Volume Converter
Liters, gallons, cups, fluid ounces and cubic measures — US customary included.
Show formula
US gallon = 3.785411784 L exactly
Inputs
Result
Your result appears here
Enter Value to convert and the result fills in as you type.
How it works
- Enter the value you want to convert.
- Pick the source and target units — use ⇄ to swap instantly.
- Read the converted result with full precision.
Frequently asked questions
US or imperial gallons?
US customary gallons, pints, quarts, cups and fluid ounces. Imperial units are not mixed in, because silently blending the two systems is how conversion mistakes happen.
How many millilitres are in a cup?
A US customary cup is 236.5882365 ml exactly. Recipes sometimes use a rounded 240 ml metric cup, so check which one your recipe means.
Why does a US pint differ from a UK pint?
They are different definitions: a US liquid pint is about 473 ml while an imperial pint is about 568 ml — a difference of roughly 20%.
How many fluid ounces are in a litre?
33.814 US fluid ounces. A US fluid ounce is exactly 29.5735295625 ml.
Examples
- How many litres are in a US gallon?
- 3.785 L — exactly 3.785411784 L.
- How many US cups are in 2 litres?
- 8.45 cups (2 ÷ 0.2365882365).
- How many US fluid ounces is 500 ml?
- 16.91 fl oz (500 ÷ 29.5735295625).
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