Volume Converter
Enter a volume, choose the unit it is in and the unit you want. You get the converted volume and a table of the same volume in every unit, US and UK.
Your numbers
How we calculate it
Every volume is turned into cubic meters and then into the unit you want. The US gallon is defined as 231 cubic inches, which is exactly 3.785411784 liters, and the US units below it follow: 4 quarts, 8 pints, 16 cups, 128 fluid ounces, with a fluid ounce equal to 2 tablespoons and a tablespoon equal to 3 teaspoons. The UK (imperial) gallon is exactly 4.54609 liters, with 8 pints and 160 fluid ounces.
So 1 US gallon is 3.785411784 liters, a US cup is 236.5882365 milliliters and a cubic foot is 28.316846592 liters. Results are shown to 12 significant digits.
Assumptions and limits
- US and UK units with the same name are different sizes. A UK pint is 568.26125 mL and a US pint is 473.176473 mL. The page shows both, so pick the right one.
- These are liquid measures. US dry measures, such as the dry quart, are not included.
- For cooking amounts in cups and ounces there is also a dedicated cups to ounces calculator.
Frequently asked questions
How many liters are in a US gallon?
A US gallon is exactly 3.785411784 liters. A UK gallon is larger, at exactly 4.54609 liters.
How many cups are in a gallon?
There are 16 US cups in a US gallon, along with 4 quarts, 8 pints and 128 fluid ounces.
What is the difference between a US and a UK pint?
A US pint is 473.176473 milliliters. A UK (imperial) pint is 568.26125 milliliters, about 20% larger, because the UK system uses a bigger gallon.
Related calculators
Worked example (a fixed example using the starting numbers, it does not change as you type)
Inputs: Value to convert = 1; From = US gallon (US gal); To = liter (L).
- Result 3.785411784 L
- Conversion 1 US gal = 3.785411784 L
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