How many grams are in 1 cup of flour?

One US cup of all-purpose flour weighs approximately 125 grams when properly measured using the spoon-and-level method. However, this can vary by flour type: bread flour is about 130g per cup, while cake flour is about 115g per cup.

What's the difference between US cups and UK cups?

US cups (236.588 mL) are smaller than UK metric cups (250 mL) and significantly smaller than old UK imperial cups (284 mL). This 20% difference between US and Imperial cups can dramatically affect your baking results.

Why should I weigh ingredients instead of using cups?

Weighing ingredients is more accurate and consistent than volume measurements. How you scoop flour into a cup can result in 20-30% variation in the actual amount. Professional bakers always weigh ingredients because it ensures consistent results every time.

How do I convert tablespoons to grams?

Converting tablespoons to grams depends on the ingredient because different ingredients have different densities. For example, 1 tablespoon of flour weighs about 7.8g, while 1 tablespoon of sugar weighs about 12.5g.

Are Australian tablespoons different?

Yes! Australian tablespoons are 20 mL, while US and UK tablespoons are 15 mL. This means Australian recipes use fewer tablespoons per cup (12.5 vs 16).

How many grams are in 1 cup of flour?

One US cup of all-purpose flour weighs 125 grams when measured using the spoon-and-level method. Bread flour is slightly heavier at 130g per cup, while cake flour is lighter at 115g per cup.

How many grams are in 1 cup of sugar?

One US cup of granulated white sugar weighs 200 grams. Brown sugar (packed) is 220g per cup, and powdered sugar is only 120g per cup.

Why do different ingredients have different gram weights per cup?

Each ingredient has a unique density. Cups measure volume (the space something takes up), while grams measure mass (actual weight). Dense ingredients like sugar pack more mass into a cup than airy ingredients like flour.

Can I convert half a cup or 1/3 cup to grams?

Yes! For example, 1/2 cup flour = 62.5g, 1/3 cup flour = 41.7g, and 1/4 cup flour = 31.3g. The calculator handles any cup amount including fractions.

How many grams in 1/2 cup of cornstarch?

Half a cup of cornstarch weighs 64.0 grams. Similarly, 1/3 cup = 42.2g and 1/4 cup = 32.0g.

Cornstarch Cups to Grams Converter

Convert cups of cornstarch to grams instantly. Accurate conversion: 1 cup = 128g. Free calculator for baking.

Cornstarch Cups to Grams

Convert cups of cornstarch to grams with our free calculator. One cup of cornstarch weighs approximately 128 grams.

💡 Corn starch / cornflour

Universal Baking Converter

Cup Size

Most common in US recipes - United States

From

Ingredient

💡 Corn starch / cornflour

Amount

Quick Presets:

Common Cornstarch Measurements

Cups	Grams	Ounces
1/4 cup	32.0g	1.13oz
1/3 cup	42.2g	1.49oz
1/2 cup	64.0g	2.26oz
2/3 cup	85.8g	3.03oz
3/4 cup	96.0g	3.39oz
1 cup	128.0g	4.52oz
1 1/2 cups	192.0g	6.77oz
2 cups	256.0g	9.03oz

* Based on US Customary cup (236.588 mL)

Tips for Measuring Cornstarch

Best Practice: For the most accurate and consistent results, weigh yourcornstarch using a digital kitchen scale. Weight measurements eliminate the variability of volume measurements.

Cup Size Variations for Cornstarch

Cup Type	Volume	Weight
US Customary Cup	236.588 mL	128.0g
US Legal Cup	240 mL	129.8g
Metric Cup	250 mL	135.3g
Imperial Cup	284.131 mL	153.7g
Australian Cup	250 mL	135.3g

The weight of 1 cup of cornstarch varies depending on which cup size you use. Most American recipes use the US Customary cup (236.588 mL).

Frequently Asked Questions About Cornstarch

How many grams in 1 cup of cornstarch?

One US cup of cornstarch weighs 128 grams. This is based on the US Customary cup (236.588 mL) and assumes proper measuring technique. Different cup sizes (Metric, Imperial) will yield slightly different weights—use our calculator above to select your specific cup size for accurate conversions.

How do I accurately measure cornstarch in cups?

Spoon cornstarch into the measuring cup and level off with a straight edge. Avoid packing unless the recipe specifically calls for it.

Can I substitute cornstarch with a similar ingredient?

While similar ingredients in the other category might have comparable weights per cup, they often have different properties that affect the final recipe. Always use the specific ingredient called for unless you're experienced with substitutions.

Why is weighing cornstarch better than measuring by cups?

Weighing cornstarch eliminates the variability of cup measurements. How you scoop, pack, or settle the cornstarch can change the amount by 20-30%. Professional bakers always weigh ingredients because 128 grams is always 128 grams, regardless of technique. A $20 digital scale will dramatically improve your baking consistency.

How many grams in 1/2 cup, 1/3 cup, and 1/4 cup of cornstarch?

For cornstarch: 1/2 cup = 64.0g, 1/3 cup = 42.2g, and 1/4 cup = 32.0g. See the full conversion table above for more common measurements including 2/3 cup, 3/4 cup, and multi-cup amounts.

Related Other Conversions

Cocoa Powder

1 cup = 85g

Rolled Oats

1 cup = 90g

White Rice (Uncooked)

1 cup = 185g

Nuts (Chopped)

1 cup = 125g

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