Whether you're baking cookies, cakes, or homemade bread, converting grams to cups can sometimes be confusing. While grams measure weight, cups measure volume, which means the conversion depends on the ingredient.

A bowl of all-purpose flour with measuring cups and baking tools for grams to cups conversions.

Why Flour Weight Matters

Unlike liquids, flour can be packed tightly or lightly into a measuring cup. That's why measuring flour by weight is much more accurate than measuring by volume.

One cup of all-purpose flour weighs approximately 120 grams when measured correctly using the spoon-and-level method.

If you scoop directly from the bag, you may accidentally add 20–30% more flour, which can lead to dry cookies, dense cakes, or heavy bread.

All-Purpose Flour Grams to Cups Chart

Grams	US Cups
30 g	¼ cup
60 g	½ cup
75 g	⅝ cup
90 g	¾ cup
100 g	¾ cup + 2 tbsp
120 g	1 cup
150 g	1¼ cups
180 g	1½ cups
200 g	1⅔ cups
240 g	2 cups
300 g	2½ cups
360 g	3 cups
480 g	4 cups

How to Measure Flour Correctly

For the best baking results:

Fluff the flour with a spoon before measuring.
Spoon the flour into the measuring cup.
Don't tap or shake the cup.
Level the top with a straight edge.
For the greatest accuracy, use a digital kitchen scale.

This method gives approximately 120 grams per US cup, which is the standard used by most American baking recipes.

Why Do Some Charts Use 125 Grams?

You may notice that some cookbooks and websites list 1 cup of all-purpose flour as 125 grams instead of 120 grams.

That's because different organizations use slightly different standards.

Generally:

King Arthur Baking: 120 g
Most American food blogs: 120 g
USDA: about 125 g
Many European recipes: 125 g

Both values are considered correct. The important thing is to stay consistent throughout the recipe.

Common Flour Conversions

50 grams flour = about ⅓–½ cup
100 grams flour = about ¾ cup + 2 tablespoons
120 grams flour = 1 cup
150 grams flour = 1¼ cups
200 grams flour = about 1⅔ cups
240 grams flour = 2 cups
500 grams flour = about 4 cups + 2 tablespoons

Expert Baking Tips

✔ Weigh flour whenever possible for the most consistent results.

✔ If using measuring cups, always use the same set throughout the recipe.

✔ Never pack flour into the measuring cup unless the recipe specifically tells you to.

✔ Sifting flour before measuring changes the volume, so follow the recipe instructions carefully.

✔ Store flour in an airtight container to keep moisture out and maintain accurate measurements.

More Flour & Kitchen Conversion Guides

Looking for another ingredient? Explore these handy conversion guides:

Bread Flour Grams to Cups (coming soon)
Cake Flour Grams to Cups (coming soon)
Whole Wheat Flour Grams to Cups (coming soon)
Almond Flour Grams to Cups (coming soon)
Brown Sugar Grams to Cups (coming soon)
Butter Grams to Cups (coming soon)
Kitchen Measurements Guide (US & Metric)
Grams to Cups Conversion Chart
Bean Conversion Guide

FAQ

How many cups is 100 grams of all-purpose flour?

About ¾ cup plus 2 tablespoons.

Is 120 grams always equal to 1 cup of flour?

For most American recipes, yes. Some sources use 125 grams, but 120 grams is the most common standard used by home bakers.

Should I use cups or grams for baking?

Grams are more accurate because they measure weight rather than volume. If a recipe provides both, use grams whenever possible.

Can I use this chart for bread flour?

No. Bread flour has a slightly different weight, so it's best to use a dedicated bread flour conversion chart.

Does sifted flour weigh the same?

No. Sifted flour is lighter, so one cup of sifted flour weighs less than one cup of unsifted flour.

All-Purpose Flour Grams to Cups (Conversion Chart)