Cups to Grams of Flour Converter (cup to g)

American recipes measure flour by volume, so a cookie or cake recipe asks for 2¼ cups rather than a weight, while kitchen scales and most recipes written outside the US work in grams. This converter assumes 125 g per US cup, the portion weight USDA lists for unsifted all-purpose flour spooned into the cup and leveled. The cup itself is a fixed volume of 236.5882365 mL; only the weight of flour that fills it is an estimate.

How the flour gets into the cup changes the answer more than any rounding. Dipping the cup straight into the bag packs the flour down and gives a heavier cup, while sifting first leaves air between the particles and gives a lighter one. Bread flour, whole wheat and cake flour are not covered by the 125 g figure, so weigh those, or the all-purpose flour itself, when a recipe is sensitive to the amount.

How to use this tool

1. Type a value in the Cup box to see it in grams of flour, or type in the Gram of Flour box to convert the other way.
2. Press ⇄ to swap the two units, or Load example for a typical value.
3. Check the charts below for common values; for other units, open the Cooking Measure converter.

Formula

grams of flour = cups × 125 (all-purpose flour, USDA)

cups = grams of flour ÷ 125 (all-purpose flour, USDA)

Both factors come from the converter's own definitions: 1 gram of flour = 0.008 cups and 1 cup = 125 grams of flour (shown to 12 significant digits).

Example

Two conversions worked with the same factors the converter uses:

2.25 cup = 281.25 g flour

500 g flour = 4 cup

Cup to Gram of Flour chart

Common values from cups to grams of flour, rounded to four decimal places.

Gram of Flour to Cup chart

The reverse direction for values people often look up.

Flour measured by the cup in US kitchens

Quick mental estimate

Count 125 g per cup and remember that 4 cups make 500 g: 3 cups → 375 g, and each extra quarter cup adds about 31 g, so 2¼ cups → 250 + 31 = 281 g. These steps use the converter's own factor, so the only error is the quarter gram dropped from 31.25.

Use the converter or the charts when the exact figure matters.

The two units

Cup (cup): The US customary cup used in American recipes holds 8 US fluid ounces or 16 tablespoons, exactly 236.5882365 mL. US nutrition labels round it to 240 mL, and the metric cup used in Australia and many other countries is 250 mL.

Gram of Flour (g flour): This estimate uses 125 g per US cup of unsifted, spooned all-purpose flour, the portion weight in USDA’s Nutritive Value of Foods table (2002). Packing, sifting and flour type change the mass, so weigh the flour when accuracy matters.