How many milliliters are in 20 fl oz?

20 US fluid ounces equal 591.47 ml, and 20 Imperial (UK) fluid ounces equal 568.26 ml. Use the US figure for American recipes, nutrition labels and cups; use the Imperial figure in the UK, Ireland, Australia and Canada. They differ because a US fluid ounce is 29.5735 ml while an Imperial fluid ounce is 28.4131 ml.

Is 20 fl oz measured in US or Imperial ounces?

By default, 'fl oz' means US fluid ounces in the United States and Imperial fluid ounces in the UK and Commonwealth. 20 US fl oz is 591.47 ml; 20 Imperial fl oz is 568.26 ml — a difference of 23.21 ml. If a recipe does not say, match it to where the recipe was written.

How many ml is 20 UK fluid ounces?

20 Imperial (UK) fluid ounces equal 568.26 ml. Imperial ounces are about 4% smaller than US ounces, so a British recipe calling for 20 fl oz gives slightly less liquid than 20 US ounces, which would be 591.47 ml.

How many cups is 20 fl oz?

20 US fluid ounces is exactly 2.5 US cups (591.47 ml). One US customary cup is 8 fluid ounces, so you can divide any fluid-ounce figure by 8 to get cups. In millilitres, 20 US fl oz is 591.47 ml and 20 Imperial fl oz is 568.26 ml.

How do you convert 20 fl oz to ml?

Multiply by the size of one fluid ounce. US: 20 × 29.5735 = 591.47 ml. Imperial: 20 × 28.4131 = 568.26 ml. To go from millilitres back to fluid ounces, divide by the same factor.

Is a UK pint 20 ounces?

Yes. One UK (Imperial) pint is exactly 20 Imperial fluid ounces, 568.26 ml. A US pint is only 16 US fluid ounces, 473.18 ml. The British pint is both more ounces and, ounce-for-ounce, a different size, so the two pints differ by almost 95 ml.

20 fl oz in ml

20 fl oz in ml is 591.47 ml using US fluid ounces, or 568.26 ml using Imperial (UK) fluid ounces. Twenty fluid ounces is the classic British measure: twenty Imperial ounces make exactly one UK pint. This page gives you both conversions, a live fluid-ounce converter that also handles cups, tablespoon…

FL OZ CONVERTER

Fluid ounces

Ounce type

1 US fl oz = 29.5735 ml · 1 Imperial fl oz = 28.4131 ml

Convert to

20 US fl oz =

591.47

Milliliter

LIVE DIAGRAM

US FLUID OUNCE

591.47

milliliters

IMPERIAL (UK)

568.26

milliliters

US vs IMPERIAL — 20 FL OZ

US591.47 ml

Imperial (UK)568.26 ml

The US ounce is larger by 23.21 ml (4.1%) at this amount.

VISUAL FILL

1 US cup +

1 US cup = 236.59 ml

Created with❤️byeaglecalculator.com

20 FL OZ IN ML

20 FLUID OUNCES → MILLILITERS

20 US fluid ounces	591.47 ml	× 29.5735 ml
20 Imperial (UK) fluid ounces	568.26 ml	× 28.4131 ml

Twenty fluid ounces is the classic British measure: twenty Imperial ounces make exactly one UK pint. Unless a recipe or label says otherwise, US fluid ounces are the default in the United States, while UK, Irish, Australian and Canadian recipes use the slightly smaller Imperial fluid ounce.

20 US FL OZ IN OTHER UNITS

MILLILITERS

591.47 ml

LITRES

0.591 L

US TABLESPOONS

40 tbsp

US TEASPOONS

120 tsp

US CUPS (240 ML)

2.46 cups

HOW TO USE

1
Enter the number of fluid ounces you want to convert — this page starts with 20.
2
Choose whether your figure is in US or Imperial (UK) fluid ounces using the toggle.
3
Pick a target unit — millilitres, litres, cups, tablespoons, teaspoons or pints — and read the result instantly.

GOOD TO KNOW

20 Imperial fluid ounces is exactly one UK pint, 568.26 ml. Because Britain uses larger pints and smaller ounces, a 'pint' means different things on each side of the Atlantic.

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Last updated: July 28, 2026 · Conversion factors: 1 US fl oz = 29.5735295625 ml, 1 Imperial fl oz = 28.4130625 ml · Verified by the EagleCalculator team · Eagle-eyed accuracy for every calculation.

20 fl oz in ml

FL OZ CONVERTER

LIVE DIAGRAM

20 FL OZ IN ML

20 US FL OZ IN OTHER UNITS

HOW TO USE

GOOD TO KNOW

FREQUENTLY ASKED QUESTIONS

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