What is the volume of one UK teaspoon?

Traditionally, one UK teaspoon is defined as 1/6 of an imperial fluid ounce, approximately 4.736 millilitres; however, many modern uses employ the metric teaspoon of 5 millilitres.

How is a UK fluid ounce defined?

The UK fluid ounce is 1/160 of an imperial gallon, exactly 28.4130625 millilitres, used in British imperial measurements.

Why does the UK teaspoon volume vary in use?

Because older culinary and nutrition contexts reference the traditional volume, while many modern recipes and labeling use the 5 mL metric teaspoon, causing some variability.

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

Easily convert volume measurements from teaspoon (UK) to fluid ounce (UK) using this helpful online unit converter tool, designed for culinary and traditional British measure conversions.

Teaspoon (UK)

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

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

Teaspoon (UK)	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

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

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What Is This Tool?

This converter allows users to change volume amounts from teaspoon (UK), a unit used mainly in cooking and nutrition labeling, into fluid ounce (UK), an imperial measure commonly found in traditional British recipes and beverage serving.

How to Use This Tool?

Enter the quantity in teaspoon (UK) you want to convert.
Select teaspoon (UK) as the input unit and fluid ounce (UK) as the output unit.
Click the convert button to obtain the equivalent volume in fluid ounces (UK).

Key Features

Converts small culinary volume units to larger imperial liquid measures.
Supports traditional UK teaspoon definitions and modern metric variations.
Includes exact British imperial fluid ounce values based on official standards.
Useful for recipes, nutrition labels, beverage measurements, and pharmaceutical contexts.
Simple interface for quick and accurate unit conversions.

Examples

3 teaspoon (UK) equals 0.625 fluid ounce (UK).
6 teaspoon (UK) equals 1.25 fluid ounce (UK).

Common Use Cases

Converting ingredient amounts in UK-based cooking and baking recipes.
Interpreting nutrition information with UK teaspoons on food labels.
Measuring drinks and spirits in traditional British bartending.
Understanding imperial volumes on pharmaceutical labels or legal documents.

Tips & Best Practices

Verify whether recipes or labels use the historical UK teaspoon or the metric teaspoon (5 mL) to ensure proper conversions.
Use dedicated dosing instruments for administering liquid medicines rather than relying solely on teaspoon conversions.
For scientific or precise engineering uses, consider converting fluid ounces to millilitres or litres as these are standard in technical contexts.

Limitations

Teaspoon (UK) volume varies between traditional (around 4.736 mL) and metric (5 mL) definitions which can affect conversion accuracy.
Conversions to fluid ounce (UK) are exact in imperial terms but metric conversions may be preferred for scientific use.
This tool does not convert to non-listed units or account for regional variations beyond UK standards.

Frequently Asked Questions

What is the volume of one UK teaspoon?: Traditionally, one UK teaspoon is defined as 1/6 of an imperial fluid ounce, approximately 4.736 millilitres; however, many modern uses employ the metric teaspoon of 5 millilitres.
How is a UK fluid ounce defined?: The UK fluid ounce is 1/160 of an imperial gallon, exactly 28.4130625 millilitres, used in British imperial measurements.
Why does the UK teaspoon volume vary in use?: Because older culinary and nutrition contexts reference the traditional volume, while many modern recipes and labeling use the 5 mL metric teaspoon, causing some variability.

Key Terminology

Teaspoon (UK): A traditional UK culinary unit for small volumes, historically 1/6 of an imperial fluid ounce (~4.736 mL), also often represented as the metric teaspoon of 5 mL.
Fluid ounce (UK): A British imperial liquid volume unit equal to 1/160 of an imperial gallon, exactly 28.4130625 millilitres, used in traditional measures and some legal and commercial settings.
Imperial gallon: The base British imperial volume unit from which the fluid ounce (UK) is derived, used for defining fluid volume standards in the UK.

Quick Knowledge Check

What is the approximate ratio of one UK teaspoon to UK fluid ounce?

1 teaspoon (UK) = 0.5 fluid ounce (UK)

1 teaspoon (UK) = 0.2083333333 fluid ounce (UK)

1 teaspoon (UK) = 0.75 fluid ounce (UK)

Which volume unit is defined as exactly 28.4130625 millilitres?

UK teaspoon

Fluid ounce (UK)

Metric teaspoon

In what contexts is the teaspoon (UK) commonly used?

Heavy machinery volume measurement

Measuring small ingredient quantities in UK recipes and nutrition labeling

Large liquid container measurements

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