FreeToolStation

Volume Converter

Litres, gallons, pints and cups, both gallons included.

Unit Converters Free, no sign-up Runs in your browser
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Result
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To twelve digits
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Conversion factor
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The other way
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In scientific notation
UnitValueSymbol

About the Volume Converter

Volume Converter covers metric, US customary and imperial units together, which is necessary because the last two disagree. An imperial gallon is 4.546 litres and a US gallon is 3.785, a twenty per cent difference, and the same split runs through pints and fluid ounces.

That makes a recipe or a fuel figure ambiguous unless you know which system it came from. A pint of beer in London is 568 ml; in New York it is 473. An imperial fluid ounce is 28.41 ml and a US one is 29.57 -- the only case where the imperial unit is the smaller of the two, because the two systems defined their ounces against different gallons.

The cubic units are in the same table because volume is volume: a litre is exactly a cubic decimetre, a cubic metre is a thousand litres, and a cubic centimetre is a millilitre. That last equivalence is why engine sizes are quoted in cc and in litres interchangeably.

The page shows its working, not just its answer. Where there is a formula it is printed with your own numbers substituted in, so you can check the result rather than take it on trust -- which is the difference between a calculator you can use for something that matters and one you cannot.

Everything runs inside your browser. What you type is never uploaded, never logged and never stored, and the calculator keeps working if your connection drops after the page has loaded.

Looking for something this does not cover? FreeToolStation.com is a second collection of the same kind of everyday tools, and it is worth a look if volume converter is only part of what you are working on.

How to use the Volume Converter

  1. Choose from and toThe fields below change to match what you pick, so only the figures that matter to your case are asked for.
  2. Enter valueDecimals are fine, and thousands separators are accepted and ignored.
  3. Read the result, to twelve digits and conversion factorThe figures update as you type. The Calculate button is there if you would rather press something, but nothing waits for it.
  4. Copy or check the resultCopy the summary with the copy button, or open the table to check it row by row.

Features

  • Shows result, to twelve digits, conversion factor, the other way and in scientific notation together, so you are not running it twice
  • A results table you can read across
  • Updates as you type, with no button to press and no page reload
  • Copy the result in one click
  • Free, no sign-up, and it runs entirely in your browser

Who uses this tool

The volume converter is used by writers, developers, students, marketers and anyone else who needs the job done once without installing software. Common cases include:

  • Converting a recipe between millilitres and cups
  • Working out a fuel quantity in US or imperial gallons
  • Converting a tank volume from cubic metres to litres
  • Reading a US recipe with imperial measuring jugs

Frequently asked questions

Which gallon should I use?

The US gallon (3.785 L) for anything American, the imperial gallon (4.546 L) for older British and Commonwealth figures. They differ by about twenty per cent.

Why is a US fluid ounce larger than an imperial one?

Because the two systems defined their gallons differently and then divided them into different numbers of ounces. A US fluid ounce is 29.57 ml, an imperial one 28.41.

Is a millilitre the same as a cubic centimetre?

Yes, exactly. A litre is a cubic decimetre, so a millilitre is a cubic centimetre, which is why engine capacities appear in both.

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Checked and rebuilt on 2026-10-14. The method this calculator uses is described in the section above, and corrections go through the contact page.