Volume Converter
Free volume converter: litres to US or UK gallons, ml to cups, tablespoons and fluid ounces. US and imperial units are labelled and exact where possible.
How to use Volume Converter
- 1Enter a volume, such as 5 or 0.75.
- 2Choose From and To units; check whether you need the US or UK version of a pint, quart or gallon.
- 3Copy the result or use All units to compare US and UK sizes of the same unit.
What makes it better
- US customary and UK imperial units side by side, each labelled
- Millilitres, litres and cubic metres, plus cubic inches and feet
- Exact definitions such as 1 US gallon = 231 cubic inches = 3.785411784 L
- Convert and All units modes, with the factor shown
About Volume Converter
Volume Converter handles metric volumes (millilitre, litre, cubic metre), US customary units (teaspoon, tablespoon, fluid ounce, cup, pint, quart, gallon) and UK imperial units (fluid ounce, pint, quart, gallon). A US gallon is 3.785411784 L and an imperial gallon is 4.54609 L, and the page keeps them clearly apart. US dry measures such as bushels are not included.
Common uses
- Convert a US recipe in cups and tablespoons into millilitres for a metric kitchen.
- Work out fuel economy or tank sizes when a car is quoted in US gallons and your country uses litres.
- Compare a UK pint with a US pint when ordering or following a brewing recipe.
- Check a fish-tank or water-tank size given in gallons against its capacity in litres.
Example
Input
5
Result
5 gal (US) = 18.92705892 l
Good to know
- US and UK gallons, quarts, pints and fluid ounces are different sizes. Each is labelled (US) or (UK) in the menus.
- The cup is the US customary cup of 236.588 ml, not the metric 250 ml cup. A teaspoon is 4.9289 ml here, even though recipes often use 5 ml.
- Dry measures (dry pint, bushel) are not included, and weights of ingredients are not volume conversions.
Volume Converter FAQ
How many litres are in a US gallon?
One US liquid gallon is exactly 3.785411784 litres. So 5 US gallons is 18.92705892 litres. The UK gallon is larger, at 4.54609 litres, so check which one your source uses.
Is a UK gallon bigger than a US gallon?
Yes, by about 20%. The imperial gallon holds 4.54609 L against 3.785 L for the US gallon, which is why fuel economy in mpg looks better in the UK than for the same car in the US.
How many ml are in a cup?
A US customary cup is 236.5882365 ml, often rounded to 240 ml on nutrition labels. A metric cup is 250 ml, which this page does not use, so say which cup your recipe means.
How many tablespoons are in a cup?
A US cup holds 16 US tablespoons, because a tablespoon is half a fluid ounce and a cup is 8 fluid ounces. In teaspoons that is 48.
How many litres are in a cubic metre?
One cubic metre contains exactly 1,000 litres, and one litre is 1,000 cubic centimetres (1,000 ml). That makes a millilitre exactly the same as a cubic centimetre.