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US teaspoon to Millilitre Converter
Converts us teaspoon to millilitre instantly. One us teaspoon equals 4.9289215938 millilitre. Includes a reference table and the reverse conversion.
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Enter a value to convert.
In short
One us teaspoon equals 4.9289215938 millilitre. To convert us teaspoon to millilitre, multiply by 4.9289215938. To go the other way, multiply millilitre by 0.2028841362. So 5 us teaspoon is 24.6446079688 millilitre, 10 is 49.2892159375 and 100 is 492.892159375. 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. American and Canadian spelling writes this us teaspoon to milliliter; it is the same unit and the same factor.
How to use the US teaspoon to Millilitre 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 Millilitre Converter
The US teaspoon to Millilitre Converter converts us teaspoon to millilitre instantly. One us teaspoon equals 4.9289215938 millilitre. 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 millilitre.
- Getting the factor itself so you can reuse it in a formula.
Details
| 1 US teaspoon | 4.9289215938 Millilitre |
|---|---|
| 1 Millilitre | 0.2028841362 US teaspoon |
| Conversion type | Exact multiplication — no offset needed |
| Measures | Cooking measures |
The maths behind it
This tool uses millilitre = us teaspoon × 4.9289215938, 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
Is it spelled millilitre or milliliter?
Millilitre is the British and international spelling and milliliter is the American and Canadian one. They are the same unit, so 1 us teaspoon is 4.9289215938 millilitre however it is written.
Do I need an account to use the US teaspoon to Millilitre Converter?
There is no cost and no cap. The US teaspoon to Millilitre Converter is not a demo of a paid product, so nothing is held back or watermarked.
Can you see what I put into this page?
No. The US teaspoon to Millilitre Converter runs entirely in your browser using JavaScript. Because the work happens locally, the page also keeps working if your connection drops, and closing the tab is all it takes to discard everything.
What formula does the US teaspoon to Millilitre Converter use?
It uses millilitre = us teaspoon × 4.9289215938, 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.
Give me a worked example.
Enter 10 us teaspoon and the US teaspoon to Millilitre Converter returns 49.2892159375 millilitre.
What do people use the US teaspoon to Millilitre Converter for most?
Typical uses: converting a single us teaspoon figure without opening a spreadsheet. Checking a specification written in us teaspoon against equipment rated in millilitre. 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 4.9289215938 Millilitre. 1 Millilitre is 0.2028841362 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.
Can I rely on this for exact work?
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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