What is the difference between fluid ounce (US) and fluid ounce (UK)?

The US fluid ounce equals exactly 29.5735295625 milliliters, while the UK fluid ounce equals exactly 28.4130625 milliliters. They represent similar but distinct liquid volume units.

When should I convert fluid ounces from US to UK?

You should convert when comparing recipes, product labels, or scientific data between American and British measurement systems to ensure accurate volume understanding.

Can this conversion be used for dry ounces or weight measurements?

No, this conversion only applies to liquid volume. Dry ounces and mass units differ and require separate conversions.

Convert Fluid Ounce (US) to Fluid Ounce (UK) Online

Easily convert volume measurements from fluid ounce (US) to fluid ounce (UK) using this reliable online tool. Perfect for culinary, beverage, pharmaceutical, and scientific applications.

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

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

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

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

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

Explore More Volume Units Converter

What Is This Tool?

This converter enables users to change volume values from the US customary fluid ounce to the UK imperial fluid ounce. It helps compare liquid measurements between American and British standards for various professional and everyday uses.

How to Use This Tool?

Enter the volume value in fluid ounce (US) units
Select the source unit as fluid ounce (US) and the target unit as fluid ounce (UK)
Click the convert button to get the equivalent volume in fluid ounce (UK)
Review the results and use them as needed in recipes, labeling, or calculations

Key Features

Precise conversion from US fluid ounce to UK fluid ounce volumes
Clear unit definitions based on US and UK measurement systems
Useful for cooking, beverage service, pharmaceuticals, and technical documentation
Browser-based interface for quick and convenient use
Includes examples for easy understanding of conversions

Examples

Convert 5 fl oz (US) to fl oz (UK): 5 × 1.0408427308 = 5.204213654 fl oz (UK)
Convert 10 fl oz (US) to fl oz (UK): 10 × 1.0408427308 = 10.408427308 fl oz (UK)

Common Use Cases

Measuring ingredients in US recipes and adjusting for British measurements
Comparing beverage volumes on US and UK product labels
Understanding liquid volumes on older pharmaceutical or legal UK documents
Bartending and beverage service using imperial units
Scientific and engineering contexts requiring consistent volume units

Tips & Best Practices

Always verify that the measurement is for liquid volume before converting
Use this tool to ensure accurate ingredient quantities in cooking and recipes
Confirm product volume units on labels to avoid misinterpretation
Be aware that fluid ounce volumes differ slightly between US and UK systems
Avoid using this conversion for dry ounces or mass-based measurements

Limitations

Slight volume differences between US and UK fluid ounces can affect precision
Conversion is not valid for dry ounces or weight units
The tool only applies to liquid volume measurement contexts
Users should confirm their specific application requires this conversion

Frequently Asked Questions

What is the difference between fluid ounce (US) and fluid ounce (UK)?: The US fluid ounce equals exactly 29.5735295625 milliliters, while the UK fluid ounce equals exactly 28.4130625 milliliters. They represent similar but distinct liquid volume units.
When should I convert fluid ounces from US to UK?: You should convert when comparing recipes, product labels, or scientific data between American and British measurement systems to ensure accurate volume understanding.
Can this conversion be used for dry ounces or weight measurements?: No, this conversion only applies to liquid volume. Dry ounces and mass units differ and require separate conversions.

Key Terminology

Fluid ounce (US) [fl oz (US)]: A US customary volume unit equal to 1/128 of a US liquid gallon or exactly 29.5735295625 milliliters, common for measuring small liquid amounts.
Fluid ounce (UK) [fl oz (UK)]: A British imperial liquid volume unit equal to 1/160 of an imperial gallon or exactly 28.4130625 millilitres, used historically and commercially in the UK.
Conversion Rate: The factor used to multiply fluid ounce (US) values to obtain the equivalent fluid ounce (UK) volumes, specifically 1 fl oz (US) = 1.0408427308 fl oz (UK).

Quick Knowledge Check

What does the US fluid ounce equal in milliliters?

Exactly 28.4130625 milliliters

Exactly 29.5735295625 milliliters

Exactly 30 milliliters

Which system does the UK fluid ounce belong to?

US customary system

British imperial system

Metric system

Is it appropriate to use this conversion for dry ounces?

Yes, they are interchangeable

No, this only applies to liquid volumes

Only for cooking purposes

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