Grams to Tablespoons: Cornstarch

One US tablespoon of cornstarch weighs 7.00 grams, so 20 g is 2.86 tablespoons and 100 g is 14.3 tablespoons. Every figure on this page is derived from a published density, linked below.

Cornstarch Converter

Locked to cornstarch — type any amount in grams.

Grams

Ingredient

2.86 tablespoons of cornstarch ≈ 2¾ tbsp · 8.57 tsp

Tablespoon

1 tablespoon cornstarch = 7.00 g · King Arthur Baking ingredient weight chart

JavaScript is off, so the spoon and measuring-method buttons above are inactive and the converter shows its preset of 20 g. The full table below gives every ingredient at this amount, and the tablespoon sections cover US, metric and Australian spoons.

Cornstarch Conversion Chart (1 g – 250 g)

Thirty common amounts, with the decimal and the nearest practical spoon. Below a quarter teaspoon the fraction is dropped, because rounding would be larger than the quantity.

Cornstarch from 1 g to 250 g. One tablespoon weighs 7.00 g, so every row is that figure divided into the amount.
Grams	Tablespoons	Nearest spoon	Teaspoons
1 g	0.14 tbsp	½ tsp	0.43 tsp
2 g	0.29 tbsp	¾ tsp	0.86 tsp
3 g	0.43 tbsp	1¼ tsp	1.29 tsp
4 g	0.57 tbsp	1¾ tsp	1.71 tsp
5 g	0.71 tbsp	2⅛ tsp	2.14 tsp
6 g	0.86 tbsp	2½ tsp	2.57 tsp
7 g	1.00 tbsp	1 tbsp	3.00 tsp
8 g	1.14 tbsp	1⅛ tbsp	3.43 tsp
9 g	1.29 tbsp	1¼ tbsp	3.86 tsp
10 g	1.43 tbsp	1½ tbsp	4.29 tsp
12 g	1.71 tbsp	1¾ tbsp	5.14 tsp
15 g	2.14 tbsp	2⅛ tbsp	6.43 tsp
20 g	2.86 tbsp	2¾ tbsp	8.57 tsp
25 g	3.57 tbsp	3½ tbsp	10.7 tsp
30 g	4.29 tbsp	4¼ tbsp	12.9 tsp
40 g	5.71 tbsp	5¾ tbsp	17.1 tsp
50 g	7.14 tbsp	7⅛ tbsp	21.4 tsp
60 g	8.57 tbsp	8½ tbsp	25.7 tsp
70 g	10.0 tbsp	10 tbsp	30.0 tsp
75 g	10.7 tbsp	10¾ tbsp	32.1 tsp
80 g	11.4 tbsp	11½ tbsp	34.3 tsp
90 g	12.9 tbsp	12¾ tbsp	38.6 tsp
100 g	14.3 tbsp	14¼ tbsp	42.9 tsp
110 g	15.7 tbsp	15¾ tbsp	47.1 tsp
125 g	17.9 tbsp	17¾ tbsp	53.6 tsp
150 g	21.4 tbsp	21½ tbsp	64.3 tsp
175 g	25.0 tbsp	25 tbsp	75.0 tsp
200 g	28.6 tbsp	28½ tbsp	85.7 tsp
225 g	32.1 tbsp	32⅛ tbsp	96.4 tsp
250 g	35.7 tbsp	35¾ tbsp	107.1 tsp

Cornstarch Types Compared

This site holds a single sourced density for cornstarch. Where a published figure exists for a sub-variety it is listed separately on the methodology page rather than averaged in here.

One US tablespoon of each type, derived from its own density.
Type	Density	1 tbsp	20 g =	Source
Cornstarch	0.4734	7.00 g	2.86 tbsp	King Arthur

The Cornstarch Measuring Pitfall

The name is the trap here, not the measurement. In the UK, Ireland, Australia and New Zealand, "cornflour" means cornstarch — the white thickening starch — and this site lists both at the same density because they are the same product. US "corn flour" is finely ground cornmeal: a different, yellower ingredient that does not convert the same way. Check which one your recipe means before you measure.

Cornstarch is one of the lighter thickeners, close to plain flour per tablespoon but not identical to it. That near-miss matters more than a bigger gap would, because the two get swapped in sauces on the assumption that they measure alike.

Cornstarch in US, Metric and Australian Tablespoons

One tablespoon of cornstarch weighs 7.00 g in a US spoon, 7.10 g in a metric spoon and 9.47 g in an Australian one. An Australian tablespoon holds 35.3% more volume than a US one, so the same weight needs 26.1% fewer of them.

Cornstarch FAQ

How many grams is 1 tablespoon of cornstarch?

One US tablespoon of cornstarch weighs 7.00 g. A 15 ml metric tablespoon holds 7.10 g and a 20 ml Australian tablespoon holds 9.47 g of it.

Why does cornstarch convert differently from other ingredients?

Because its density is 0.4734 g per ml. Density is the whole conversion: multiply it by the spoon volume to get the weight of one spoonful, then divide your grams by that.

Do different types of cornstarch weigh the same?

Not always. The comparison table above lists each variety we hold a sourced density for. Where two varieties differ, use the one your recipe names rather than the general figure.

Where does your cornstarch density come from?

From King Arthur Baking ingredient weight chart: 1/4 cup cornstarch = 28 g, i.e. 112 g/cup. We publish the source URL for every ingredient and record the published spread on our methodology page rather than averaging sources silently.

Should I measure cornstarch by weight instead?

Where you can, yes. NIST's own guidance for the metric kitchen is that mass is the reliable measure, because how you fill a spoon changes what a spoonful weighs. Volume conversions like this one are for when a scale is not to hand.

What if I need less than a tablespoon of cornstarch?

Results under one tablespoon are shown in teaspoons, since 1 tablespoon is 3 teaspoons in all three conventions. Below a quarter teaspoon we stop offering a fraction and recommend a scale — at that size two very different weights would round to the same marking.

Common Cornstarch Amounts

The amounts most often converted for this ingredient.