Why is the UK fluid ounce different from the US fluid ounce?

The UK fluid ounce is part of the British imperial system and equals exactly 28.4130625 millilitres, while the US fluid ounce is a different standard based on the US customary system. This leads to distinct volume sizes.

Can I use this converter for scientific measurements?

While this tool provides exact conversions between US teaspoons and UK fluid ounces, scientific and engineering applications typically use millilitres or litres for precision.

How do I convert larger volumes using this tool?

Simply enter the larger volume in teaspoons (US), and the converter will provide the equivalent volume in UK fluid ounces using the exact conversion factor.

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

Learn how to convert volume measurements from US teaspoons to UK fluid ounces accurately with this easy-to-use online unit converter. Ideal for cooking, baking, and pharmaceutical purposes.

Teaspoon (US)

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

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

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

Teaspoon (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.

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

Explore More Volume Units Converter

What Is This Tool?

This converter helps you change volume units from a US teaspoon to a UK fluid ounce, supporting precise interpretation of measurements commonly used in cooking, medicine dosing, and historical or legal documents.

How to Use This Tool?

Enter the volume value in teaspoons (US) you want to convert
Select the target unit as fluid ounce (UK) [fl oz (UK)]
Click the convert button to see the equivalent volume in UK fluid ounces
Review the result and apply it to your recipe, medication dosing, or documentation

Key Features

Converts US teaspoon volumes to UK fluid ounces accurately
Based on exact volume definitions in millilitres for both units
Supports international culinary, pharmaceutical, and historical use cases
Provides clear examples for ease of understanding
Accessible browser-based tool for quick conversions

Examples

2 teaspoons (US) equals approximately 0.347 fluid ounce (UK)
5 teaspoons (US) converts to about 0.867 fluid ounce (UK)

Common Use Cases

Translating small liquid volumes between American and British cooking recipes
Dosing over-the-counter liquid medicines using appropriate local units
Converting ingredient volumes in historical or legal UK documents referencing imperial units
Adapting beverage measures for services using British imperial standards

Tips & Best Practices

Always use exact conversion values to avoid volume discrepancies
Understand the volume differences between US customary and UK imperial systems
Prefer millilitres for scientific or engineering purposes when possible
Check the context of the recipe or document to determine the correct unit system

Limitations

UK fluid ounce is less frequently used today compared to millilitres
Volume differences between US and UK units may cause confusion if conversions are not precise
Using rounded values instead of exact constants can affect accuracy

Frequently Asked Questions

Why is the UK fluid ounce different from the US fluid ounce?: The UK fluid ounce is part of the British imperial system and equals exactly 28.4130625 millilitres, while the US fluid ounce is a different standard based on the US customary system. This leads to distinct volume sizes.
Can I use this converter for scientific measurements?: While this tool provides exact conversions between US teaspoons and UK fluid ounces, scientific and engineering applications typically use millilitres or litres for precision.
How do I convert larger volumes using this tool?: Simply enter the larger volume in teaspoons (US), and the converter will provide the equivalent volume in UK fluid ounces using the exact conversion factor.

Key Terminology

Teaspoon (US): A US customary volume unit equal to 1/6 of a US fluid ounce or exactly 4.92892159375 milliliters.
Fluid ounce (UK) [fl oz (UK)]: A British imperial volume unit equal to 1/160 of an imperial gallon or exactly 28.4130625 millilitres.
Conversion factor: The numerical value used to convert one unit of measurement to another, such as 1 teaspoon (US) = 0.1734737885 fluid ounce (UK).

Quick Knowledge Check

What is the exact conversion factor from 1 US teaspoon to UK fluid ounces?

0.25 fluid ounce (UK)

0.1734737885 fluid ounce (UK)

0.5 fluid ounce (UK)

Which system does the UK fluid ounce belong to?

United States customary system

British imperial system

Metric system

What is a common use of the US teaspoon unit?

Measuring large water volumes

Measuring small ingredient amounts in cooking and baking

Measuring weight of dry goods

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