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Teaspoons to Grams — Cornflour / Cornstarch
Converts teaspoon of cornflour / cornstarch to gram using its real density, not a generic volume factor. One teaspoon is 2.5 gram.
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In short
One teaspoon of cornflour / cornstarch is 2.5 gram. Going the other way, one gram is 0.4 teaspoon. That works out at 2 teaspoon = 5 gram and 4 = 10. The figure comes from cornflour / cornstarch weighing 120 g per US cup — a generic cups-to-grams converter assumes water and will give you the wrong answer here, because volume to weight depends entirely on what is in the cup.
How to use the Teaspoons to Grams — Cornflour / Cornstarch
- 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 Teaspoons to Grams — Cornflour / Cornstarch
Cornflour is a fine powder that settles hard in the box, so it is worth stirring before measuring. Because it is used in small quantities as a thickener, a proportional error here shows up quickly — a sauce thickened with 20% too much cornflour turns gluey rather than glossy. The same ingredient is called cornflour in the UK and cornstarch in the US, which is a common recipe trap. The figure this page works from is 120 g per US cup, the spooned-and-levelled weight recorded by King Arthur Baking and the USDA food database. Converting teaspoon to gram for cornflour / cornstarch, the amounts that come up most often are: 1/2 teaspoon = 1.25 gram; 1 teaspoon = 2.5 gram; 2 teaspoon = 5 gram; 3 teaspoon = 7.5 gram; 4 teaspoon = 10 gram; 6 teaspoon = 15 gram; 8 teaspoon = 20 gram; 12 teaspoon = 30 gram; 16 teaspoon = 40 gram.
What people use it for
- Following a US recipe with a kitchen scale instead of cup measures.
- Scaling a recipe up or down without compounding measuring error.
- Converting a European recipe written in grams into cups.
Details
| 1 US cup of cornflour / cornstarch | 120 g |
|---|---|
| 1 Teaspoon | 2.5 Gram |
| 1 Gram | 0.4 Teaspoon |
| Worth knowing | The same ingredient is called cornflour in the UK and cornstarch in the US, which is a common recipe trap. |
The maths behind it
This tool uses gram = teaspoon × 2.5, derived from cornflour / cornstarch weighing 120 g per US cup. Every intermediate value is shown on screen, so the result can be checked by hand.
Cornflour is a fine powder that settles hard in the box, so it is worth stirring before measuring. Because it is used in small quantities as a thickener, a proportional error here shows up quickly — a sauce thickened with 20% too much cornflour turns gluey rather than glossy.
Where this tool stops
Volume-to-weight conversion is inherently approximate. Humidity, brand, how finely something is milled and how long it has sat in the cupboard all shift the figure by a few per cent.
Frequently asked questions
Is cornflour the same as corn flour?
Not always, and this catches people out. In the UK, cornflour is the white starch thickener. In the US, "corn flour" can mean finely ground cornmeal, which is a completely different yellow ingredient. If a recipe uses it to thicken a sauce, it means the starch.
Why does a cup of cornflour / cornstarch not weigh the same as a cup of water?
Because a cup measures volume and a scale measures weight, and the two only agree for water. Cornflour / cornstarch has its own density — 120 g per US cup — so any generic volume converter gives the wrong answer here.
How much does the way I fill the cup matter?
Quite a lot. Cornflour is extremely fine and compacts readily, so a scooped cup runs well above the 120 g here. Since it is almost always used as a thickener in small quantities, the proportional error is what bites — a heaped tablespoon instead of a level one is the usual cause of a gluey sauce.
Is a US cup the same as a UK or metric cup?
No. A US cup is 236.6 ml, a metric cup is 250 ml and an old UK cup is 284 ml. These pages use the US cup, because that is what US recipes mean.
Do I need an account to use the Teaspoons to Grams — Cornflour / Cornstarch?
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 tool.
Is the Teaspoons to Grams — Cornflour / Cornstarch safe to use with private information?
No. The Teaspoons to Grams — Cornflour / Cornstarch runs entirely in your browser using JavaScript. Your input never reaches inputtesthub.com or any third party — open your browser's Network tab while you use it and you will see no request go out.
Can I check the maths myself?
It uses gram = teaspoon × 2.5, derived from cornflour / cornstarch weighing 120 g per US cup. 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 2 teaspoon of cornflour / cornstarch and the Teaspoons to Grams — Cornflour / Cornstarch returns 5 gram.
What do people use the Teaspoons to Grams — Cornflour / Cornstarch for most?
In practice it gets used for three things: following a US recipe with a kitchen scale instead of cup measures. Scaling a recipe up or down without compounding measuring error. Converting a European recipe written in grams into cups. It is built for exactly those cases rather than being a general-purpose tool with this bolted on.
Is there anything the Teaspoons to Grams — Cornflour / Cornstarch cannot do?
Volume-to-weight conversion is inherently approximate. Humidity, brand, how finely something is milled and how long it has sat in the cupboard all shift the figure by a few per cent. Knowing where a tool stops being trustworthy matters more than the cases where it works.
What figures does the Teaspoons to Grams — Cornflour / Cornstarch work from?
1 US cup of cornflour / cornstarch is 120 g. 1 Teaspoon is 2.5 Gram. 1 Gram is 0.4 Teaspoon. These are printed on the page itself, so you do not have to take them on trust.
Is the number rounded?
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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