Volume Converter
Convert between metric and imperial volume units instantly. Uses UK imperial units (pints, gallons). Type any value to update all fields.
* Using UK imperial units. US gallon = 3.785 L; UK gallon = 4.546 L.
- 1 litre = 1,000 ml; 1 cubic metre = 1,000 litres. Metric volume scales in tens.
- 1 UK pint = 568.261 ml (20 UK fl oz) — larger than a US pint (473 ml, 16 US fl oz).
- 1 UK gallon = 4.54609 L; 1 US gallon = 3.78541 L, about 20% smaller.
- 1 US cup = 236.6 ml (8 US fl oz); the UK has no legal cup, so metric 250 ml cups are common.
- This converter uses UK imperial units — always check whether a recipe means UK or US measures.
How many millilitres are in a UK pint?
1 UK pint is 568.261 ml — just over half a litre — and it contains 20 UK fluid ounces. That makes it noticeably bigger than a US pint, which is 473 ml (16 US fluid ounces). The gap matters most in cooking: an American recipe asking for "1 pint" of stock or cream means 473 ml, not the 568 ml a UK cook would pour. The converter above works entirely in UK imperial units, so its pint, quart and gallon fields are all the larger imperial versions.
| UK measure | Millilitres | Litres |
|---|---|---|
| 1 UK fl oz | 28.41 ml | 0.0284 L |
| 1 UK pint | 568.26 ml | 0.568 L |
| 1 UK quart | 1,136.52 ml | 1.137 L |
| 1 UK gallon | 4,546.09 ml | 4.546 L |
What is the difference between a UK and US gallon?
A UK (imperial) gallon is 4.54609 litres, while a US gallon is 3.78541 litres — about 20% smaller. The same split runs all the way down the imperial ladder: a UK pint (568 ml) is bigger than a US pint (473 ml), and a UK fluid ounce (28.41 ml) is slightly smaller than a US fluid ounce (29.57 ml). This is why UK miles-per-gallon figures always look better than US mpg for the same car — the UK gallon holds more fuel.
How many ml is a US cup for baking?
1 US cup is 236.6 ml, defined as 8 US fluid ounces. The UK has no legally defined cup, so British recipes that use "cups" usually mean the metric cup of 250 ml — very close but not identical. When following an American baking recipe, treat a cup as roughly 237 ml of liquid. For dry ingredients measured by weight instead, use the weight converter to switch between grams and ounces.
How do you convert litres to millilitres and cubic metres?
Multiply litres by 1,000 to get millilitres, and divide litres by 1,000 to get cubic metres — metric volume scales cleanly in powers of ten. So 2.5 litres is 2,500 ml or 0.0025 m³. This regularity is exactly why metric measures are simpler than the imperial pints and gallons that use uneven steps. For a named worked example you can check against the tool, type 1 into the UK Pints field and the converter returns 568.261 ml, 0.568261 L, 20 UK fl oz, 0.5 UK quarts and 0.125 UK gallons — the imperial pint figures used throughout this page. To scale a recipe up or down, the percentage calculator handles the proportions.
Volume conversion FAQs
1 UK pint equals 568.261 ml — just over half a litre. A UK pint is larger than a US pint (473 ml), which matters with American recipes: if a US recipe calls for 1 pint of cream, that is 473 ml, not 568 ml.
1 UK (imperial) gallon equals 4.54609 litres, while a US gallon is 3.78541 litres. Because the UK uses the larger imperial gallon, UK miles-per-gallon figures are always higher than the US mpg for the same car.
A UK (imperial) gallon is 4.54609 litres; a US gallon is 3.78541 litres — about 20% smaller. The same split runs through pints (UK 568 ml vs US 473 ml) and fluid ounces (UK 28.41 ml vs US 29.57 ml). This converter uses UK imperial units throughout.
1 US cup is 236.6 ml (about 237 ml), defined as 8 US fluid ounces. The UK has no legally defined cup, so metric cup measures of 250 ml are common — so an American recipe's cup is slightly smaller than a metric cup.
1 litre equals exactly 1,000 millilitres, and 1 cubic metre is 1,000 litres. Metric volume scales in powers of 10, which is why metric measures are simpler for cooking and science than imperial pints and gallons.
A UK pint is 20 UK fluid ounces (568.261 ml). A US pint is only 16 US fluid ounces (473 ml). So the UK pint is larger both because it has more fluid ounces and because it uses the imperial system.
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