What is a US fluid ounce?

A US fluid ounce is a unit of volume equal to 1/128 of a US liquid gallon or exactly 29.5735295625 milliliters, commonly used for measuring small liquid volumes in the US.

Is the UK cup an official measurement?

No, the UK cup is an informal culinary volume measure without a standard official definition, often aligned with the metric cup of 250 milliliters in modern use.

Why convert between US fluid ounces and UK cups?

Converting these units helps adapt recipes, measure ingredients, and reconcile volume measurements between American and British cooking and food labeling systems.

How to Convert from Fluid ounce (US) [fl oz (US)] to Cup (UK)?

Learn how to easily convert volume measurements from fluid ounce (US) to cup (UK) for cooking, baking, and recipe adaptation using our online unit converter tool.

Fluid ounce (US) [fl oz (US)]

Cup (UK)

Please check your input. It must be a valid numeric value.

Fluid ounce (US) [fl oz (US)] to Cup (UK) Conversion Table

Fluid ounce (US) [fl oz (US)]	Cup (UK)

Custom Unit Conversion Table Generator – Instant Printable Conversion Tables

Start Value

Enter the starting number (positive decimal or integer ≥ 0). Example: 0.1, 1, 5.

End Value

Enter the ending number (positive decimal or integer > Start Value). Example: 10, 50, 100.

Interval

Enter the step size (positive decimal > 0 and < End Value – Start Value). Example: 1.0, 2.5.

Fluid ounce (US) [fl oz (US)] to Cup (UK) Conversion Table
Fluid ounce (US) [fl oz (US)]	Cup (UK)

Explore More Volume Units Converter

What Is This Tool?

This converter helps you change volume measurements from the US fluid ounce to the UK cup, useful for adapting recipes and measuring liquid volumes when switching between American and British systems.

How to Use This Tool?

Enter the volume value in fluid ounces (US).
Select 'fluid ounce (US)' as the input unit.
Choose 'cup (UK)' as the output unit.
Click 'Convert' to see the equivalent volume in UK cups.
Use the result for cooking, baking, or recipe adjustments.

Key Features

Converts liquid volume from US fluid ounces to UK cups
Uses standardized US fluid ounce definitions for accuracy
Accounts for UK cup as a common culinary volume measure aligned with 250 milliliters
Supports recipe adaptation and ingredient measurement
Browser-based and easy to use with no installation needed

Examples

8 fl oz (US) equals approximately 0.8327 cup (UK)
16 fl oz (US) equals approximately 1.6653 cup (UK)

Common Use Cases

Converting ingredient volumes for recipes between US and UK measurements
Measuring liquid volumes on beverage and product labels
Portioning ingredients in home cooking and baking using British culinary volumes
Adapting recipes for international cooking contexts
Listing small liquid quantities in household product packaging with familiar units

Tips & Best Practices

Double-check unit selections to ensure accurate conversions
Use the tool for informal recipe or cooking measurements rather than precise laboratory needs
Be aware that the UK cup value may vary slightly depending on source recipes
Use metric units as a reference point when precision is required
Consider ingredient type and recipe context when converting volumes

Limitations

The UK cup lacks an official standard and may have varying values depending on the recipe source
Although the US fluid ounce is exact, conversions to UK cups might not reflect precise culinary accuracy
Older British recipes may use different implicit measures for the cup
This conversion is best for general cooking and recipe adaptation, not scientific measurement

Frequently Asked Questions

What is a US fluid ounce?: A US fluid ounce is a unit of volume equal to 1/128 of a US liquid gallon or exactly 29.5735295625 milliliters, commonly used for measuring small liquid volumes in the US.
Is the UK cup an official measurement?: No, the UK cup is an informal culinary volume measure without a standard official definition, often aligned with the metric cup of 250 milliliters in modern use.
Why convert between US fluid ounces and UK cups?: Converting these units helps adapt recipes, measure ingredients, and reconcile volume measurements between American and British cooking and food labeling systems.

Key Terminology

fluid ounce (US): A US customary volume unit equal to 1/128 of a US liquid gallon, exactly 29.5735295625 milliliters, used for measuring small liquid volumes.
cup (UK): An informal British culinary volume measure often treated as equivalent to 250 milliliters but not officially standardized.
conversion rate: The multiplier used to convert one unit of measurement into another; here, 1 US fluid ounce equals approximately 0.1040842731 UK cups.

Quick Knowledge Check

What volume in milliliters does one US fluid ounce equal?

28.4131 mL

29.5735 mL

30.0000 mL

How is the UK cup commonly treated in modern usage?

As 240 milliliters

As 250 milliliters

As 300 milliliters

What is a common use for converting fluid ounces (US) to UK cups?

Scientific laboratory measurement

Adapting culinary recipes

Measuring solid materials precisely

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