Why does the UK teaspoon volume vary?

The UK teaspoon has historically been defined as 1/6 of an imperial fluid ounce (around 4.736 mL), but many modern recipes and labels use a 5 mL metric teaspoon, causing two common values.

What is the exact conversion rate from cup (US) to teaspoon (UK)?

1 US customary cup equals approximately 39.9683608622 UK teaspoons.

Is this conversion tool suitable for medical dosing?

No, medical dosing requires dedicated measuring devices; this tool is designed for culinary and nutritional volume conversions.

How to Convert from Cup (US) to Teaspoon (UK)?

Easily convert volume measurements from US customary cups to UK teaspoons for culinary and nutritional uses with our reliable online converter.

Cup (US)

Teaspoon (UK)

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

Cup (US) to Teaspoon (UK) Conversion Table

Cup (US)	Teaspoon (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.

Cup (US) to Teaspoon (UK) Conversion Table
Cup (US)	Teaspoon (UK)

Explore More Volume Units Converter

What Is This Tool?

This unit converter allows you to convert volume measurements from the US customary cup to the UK teaspoon. It's designed to help translate ingredient volumes between US and UK culinary measures and nutrition labeling standards.

How to Use This Tool?

Enter the volume value in cup (US) you wish to convert
Select the target unit as teaspoon (UK)
Click convert to see the equivalent teaspoon amount

Key Features

Converts from US customary cup to UK teaspoon accurately based on established conversion rates
Supports culinary and nutritional volume measurement conversions
Browser-based, easy-to-use interface with quick calculations

Examples

1 cup (US) equals approximately 39.97 teaspoon (UK)
0.5 cup (US) converts to about 19.98 teaspoon (UK)

Common Use Cases

Adapting US recipe ingredient volumes to UK culinary measurements
Converting liquid and dry ingredient quantities in food formulation
Translating nutrition labeling from US to UK standards

Tips & Best Practices

Remember the UK teaspoon can be either 4.736 mL or 5 mL, so consider the recipe or label source
Be aware that the US cup might vary between standard and legal definitions
For precise medicine dosing, use dedicated measuring devices instead of volume conversions

Limitations

Variations in UK teaspoons between traditional and metric volumes may influence precision
US cup definitions differ slightly between standard and 'legal' versions affecting exact volume
Not suitable for applications demanding exact dosing precision, such as some medical uses

Frequently Asked Questions

Why does the UK teaspoon volume vary?: The UK teaspoon has historically been defined as 1/6 of an imperial fluid ounce (around 4.736 mL), but many modern recipes and labels use a 5 mL metric teaspoon, causing two common values.
What is the exact conversion rate from cup (US) to teaspoon (UK)?: 1 US customary cup equals approximately 39.9683608622 UK teaspoons.
Is this conversion tool suitable for medical dosing?: No, medical dosing requires dedicated measuring devices; this tool is designed for culinary and nutritional volume conversions.

Key Terminology

Cup (US): A US customary unit of volume equal to 8 US fluid ounces or approximately 236.5882365 milliliters, used mainly for measuring cooking ingredients.
Teaspoon (UK): A traditional UK culinary volume unit for small quantities, historically about 4.736 mL, but often used today as 5 mL in metric recipes and labels.
Conversion Rate: The factor used to translate a measurement from one unit to another; for this tool, 1 US cup equals 39.9683608622 UK teaspoons.

Quick Knowledge Check

What is the approximate number of UK teaspoons in 1 US cup?

around 20

about 40

approximately 60

Which volume does the US cup represent?

Fluid ounces

Milliliters

Both US fluid ounces and milliliters

Why might the UK teaspoon vary in volume measurement?

Different historical and metric definitions

Temperature changes

Variations in container size

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