Volume Converter
Litres, gallons, pints, and fluid ounces — with US and UK sizes kept apart.
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Decimals and fractions both work — 1.5 or 1 1/2.
250 ml = 8.453506 fl oz
250 ml in every other unit
- Centilitre (cl)25
- Decilitre (dl)2.5
- Litre (L)0.25
- Cubic metre (m³)0.00025
- Teaspoon (US) (tsp)50.72103
- Tablespoon (US) (tbsp)16.90701
- Fluid ounce (US) (fl oz)
About 4% larger than the imperial fluid ounce.
8.453506 - Cup (US customary) (cup)
8 US fl oz. Nutrition labels use a 240 ml "legal cup" instead.
1.056688 - Pint (US) (pt)0.5283441
- Quart (US) (qt)0.2641721
- Gallon (US) (gal)
About 17% smaller than the imperial gallon.
0.06604301 - Fluid ounce (imperial) (fl oz)8.79877
- Pint (imperial) (pt)
20 imperial fl oz, against the US pint’s 16 US fl oz.
0.4399385 - Quart (imperial) (qt)0.2199692
- Gallon (imperial) (gal)0.05499231
- Cubic inch (in³)15.25594
- Cubic foot (ft³)0.008828667
- Barrel (oil) (bbl)
42 US gallons — the unit crude oil is quoted in.
0.001572453
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How to use it
Enter an amount and pick its unit to convert volume. US and UK gallons, pints, and fluid ounces are listed separately, because they’re different sizes despite the same names.
Type an amount and pick its unit to see it in litres, millilitres, gallons, pints, and fluid ounces.
Watch out: the US and the UK use the same names for different amounts. A UK gallon is about 20% bigger than a US gallon, which is why car fuel economy (mpg) figures from the two countries don’t match. That’s why each has its own heading.
It gets stranger: a UK pint is bigger than a US pint, but a UK fluid ounce is slightly smaller than a US one.
Converting cups for a recipe? Use the cooking converter instead — it can turn cups into grams for your ingredient.
Millilitres to US fluid ounces
One US fluid ounce is about 29.6 ml.
| Millilitres | US fluid ounces |
|---|---|
| 15 ml | 0.50721 fl oz |
| 30 ml | 1.01442 fl oz |
| 50 ml | 1.6907 fl oz |
| 100 ml | 3.3814 fl oz |
| 200 ml | 6.7628 fl oz |
| 250 ml | 8.45351 fl oz |
| 330 ml | 11.1586 fl oz |
| 500 ml | 16.907 fl oz |
| 750 ml | 25.3605 fl oz |
| 1,000 ml | 33.814 fl oz |
Litres to gallons — both kinds
Litres give a different number of gallons depending on which gallon you mean. Use US gallons for American fuel and containers.
| Litres | US gallons |
|---|---|
| 1 L | 0.264172 gal |
| 5 L | 1.32086 gal |
| 10 L | 2.64172 gal |
| 20 L | 5.28344 gal |
| 40 L | 10.5669 gal |
| 50 L | 13.2086 gal |
| 100 L | 26.4172 gal |
Litres to imperial gallons
A UK (imperial) gallon is about 4.55 litres, so the same tank holds fewer of them. UK mpg figures use this gallon.
| Litres | Imperial gallons |
|---|---|
| 1 L | 0.219969 gal |
| 5 L | 1.09985 gal |
| 10 L | 2.19969 gal |
| 20 L | 4.39938 gal |
| 40 L | 8.79877 gal |
| 50 L | 10.9985 gal |
| 100 L | 21.9969 gal |
FAQ
Is a US gallon the same as a UK gallon?
No. A US gallon is 3.785 litres and a UK gallon is 4.546 litres — about 20% bigger.
How many ml in a fluid ounce?
A US fluid ounce is 29.57 ml; a UK one is 28.41 ml.
Why is a UK pint bigger but a UK fluid ounce smaller?
A UK pint holds 20 fluid ounces and a US pint holds 16. So the UK pint is bigger, even though each ounce is slightly smaller.
How many litres are in a UK gallon of petrol?
4.546 litres. Petrol is sold by the litre now, but UK mpg figures still use the old gallon.
Can I use this for recipes?
For liquids, yes. To turn cups into grams, use the cooking converter.
How it worksFor the curious
Everything is defined against the litre (exactly one cubic decimetre). US customary units descend from the Queen Anne wine gallon of 231 cubic inches, so they are exact via the inch. The imperial gallon was redefined in 1985 as exactly 4.54609 litres.
An imperial pint is 20 imperial fluid ounces and a US pint 16 US fluid ounces, so the imperial pint is 20% larger. But the imperial fluid ounce (28.413 ml) is about 4% smaller than the US one (29.574 ml).
A US cup on a nutrition label is 240 ml, while the cup in a recipe is usually the customary 236.588 ml.