How many milliliters are in 9 fl oz?

9 US fluid ounces equal 266.16 ml, and 9 Imperial (UK) fluid ounces equal 255.72 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 9 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. 9 US fl oz is 266.16 ml; 9 Imperial fl oz is 255.72 ml — a difference of 10.44 ml. If a recipe does not say, match it to where the recipe was written.

How many ml is 9 UK fluid ounces?

9 Imperial (UK) fluid ounces equal 255.72 ml. Imperial ounces are about 4% smaller than US ounces, so a British recipe calling for 9 fl oz gives slightly less liquid than 9 US ounces, which would be 266.16 ml.

How many cups is 9 fl oz?

9 US fluid ounces is about 1.12 US cups, since one US cup is 8 fluid ounces (266.16 ml total). It is not a round number of cups, so for baking it is usually easier to measure 9 fl oz directly, or in millilitres: 266.16 ml (US) or 255.72 ml (Imperial).

How do you convert 9 fl oz to ml?

Multiply by the size of one fluid ounce. US: 9 × 29.5735 = 266.16 ml. Imperial: 9 × 28.4131 = 255.72 ml. To go from millilitres back to fluid ounces, divide by the same factor.

Does 9 fl oz of water weigh 266.16 grams?

Roughly, yes. Water is about 1 gram per millilitre, so 9 US fluid ounces (266.16 ml) of water weighs close to 266.16 g. This only works for water and thin water-like liquids; oil, syrup and flour all have different densities, so their weight will not match their volume in millilitres.

9 fl oz in ml

9 fl oz in ml is 266.16 ml using US fluid ounces, or 255.72 ml using Imperial (UK) fluid ounces. Nine fluid ounces is one US cup plus a single ounce — a generous glass of water. This page gives you both conversions, a live fluid-ounce converter that also handles cups, tablespoons, teaspoons, litres …

FL OZ CONVERTER

Fluid ounces

Ounce type

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

Convert to

9 US fl oz =

266.16

Milliliter

LIVE DIAGRAM

US FLUID OUNCE

266.16

milliliters

IMPERIAL (UK)

255.72

milliliters

US vs IMPERIAL — 9 FL OZ

US266.16 ml

Imperial (UK)255.72 ml

The US ounce is larger by 10.44 ml (4.1%) at this amount.

VISUAL FILL

1 US cup +

1 US cup = 236.59 ml

Created with❤️byeaglecalculator.com

9 FL OZ IN ML

9 FLUID OUNCES → MILLILITERS

9 US fluid ounces	266.16 ml	× 29.5735 ml
9 Imperial (UK) fluid ounces	255.72 ml	× 28.4131 ml

Nine fluid ounces is one US cup plus a single ounce — a generous glass of water. 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.

9 US FL OZ IN OTHER UNITS

MILLILITERS

266.16 ml

LITRES

0.266 L

US TABLESPOONS

18 tbsp

US TEASPOONS

54 tsp

US CUPS (240 ML)

1.11 cups

HOW TO USE

1
Enter the number of fluid ounces you want to convert — this page starts with 9.
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

9 US fluid ounces come to 266.16 ml, while 9 Imperial ounces are 255.72 ml — a gap of 10.44 ml at this size. Because US ounces are the larger of the two, US measurements always yield slightly more liquid than the same count of Imperial ounces.

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Last updated: July 29, 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.

9 fl oz in ml

FL OZ CONVERTER

LIVE DIAGRAM

9 FL OZ IN ML

9 US FL OZ IN OTHER UNITS

HOW TO USE

GOOD TO KNOW

FREQUENTLY ASKED QUESTIONS

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