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US teaspoon to UK teaspoon Converter
Converts us teaspoon to uk teaspoon instantly. One us teaspoon equals 0.8326738401 uk teaspoon. Includes a reference table and the reverse conversion.
Converters
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Enter a value to convert.
In short
One us teaspoon equals 0.8326738401 uk teaspoon. To convert us teaspoon to uk teaspoon, multiply by 0.8326738401. To go the other way, multiply uk teaspoon by 1.2009504224. So 5 us teaspoon is 4.1633692005 uk teaspoon, 10 is 8.3267384011 and 100 is 83.2673840107. Both units measure cooking measures, so the conversion is a single exact multiplication with no offset — the same factor works in a spreadsheet or in code.
How to use the US teaspoon to UK teaspoon Converter
- Type the value you want to convert.
- Pick the unit you are converting from and the unit you want.
- The converted value and the exact conversion factor are shown instantly.
About the US teaspoon to UK teaspoon Converter
The US teaspoon to UK teaspoon Converter converts us teaspoon to uk teaspoon instantly. One us teaspoon equals 0.8326738401 uk teaspoon. Includes a reference table and the reverse conversion. It runs as plain JavaScript inside the page, which means there is no upload step, no queue and no size limit imposed by a server — the only limit is your own device.
What people use it for
- Converting a single us teaspoon figure without opening a spreadsheet.
- Checking a specification written in us teaspoon against equipment rated in uk teaspoon.
- Getting the factor itself so you can reuse it in a formula.
Details
| 1 US teaspoon | 0.8326738401 UK teaspoon |
|---|---|
| 1 UK teaspoon | 1.2009504224 US teaspoon |
| Conversion type | Exact multiplication — no offset needed |
| Measures | Cooking measures |
The maths behind it
This tool uses uk teaspoon = us teaspoon × 0.8326738401, because both units are defined against the Millilitre. Every intermediate value is shown on screen, so the result can be checked by hand.
Frequently asked questions
Do I need an account to use the US teaspoon to UK teaspoon Converter?
No charge and no sign-up. There is no free tier to run out of because there is no paid tier — inputtesthub.com is funded by advertising rather than by metering the page.
Can you see what I put into this page?
No. The US teaspoon to UK teaspoon Converter runs entirely in your browser using JavaScript. Nothing is transmitted, logged or stored, which you can verify yourself in the Network tab of your browser's developer tools.
Can I check the maths myself?
It uses uk teaspoon = us teaspoon × 0.8326738401, because both units are defined against the Millilitre. The full working is printed under the result, so you can follow every step rather than trusting a black box.
Can you show an example?
Enter 10 us teaspoon and the US teaspoon to UK teaspoon Converter returns 8.3267384011 uk teaspoon.
What problem does the US teaspoon to UK teaspoon Converter solve?
In practice it gets used for three things: converting a single us teaspoon figure without opening a spreadsheet. Checking a specification written in us teaspoon against equipment rated in uk teaspoon. Getting the factor itself so you can reuse it in a formula. It is built for exactly those cases rather than being a general-purpose tool with this bolted on.
Which values should I know?
1 US teaspoon is 0.8326738401 UK teaspoon. 1 UK teaspoon is 1.2009504224 US teaspoon. Conversion type is Exact multiplication — no offset needed. These are printed on the page itself, so you do not have to take them on trust.
How precise is the result?
The calculation runs in double precision and the result is shown to ten significant figures, so converting a value and converting it back returns the original. What is displayed is rounded for readability; what is copied is not.
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