Bread flour grams to cups
To convert grams to cups, divide the grams by 120. For example, 100 g of bread flour ≈ 0.83 cup.
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Bread flour weighs about 120 grams per US cup, the same baseline most US recipes use for all-purpose. The number is identical, but how you scoop matters enormously here: a packed cup of bread flour can hit 150 grams and ruin a delicate crumb.
Bread flour grams to cups chart (US cup)
| Grams | Cups (approx.) | Decimal cups |
|---|---|---|
| 25 g | 0.21 cup | 0.21 |
| 50 g | 0.42 cup | 0.42 |
| 75 g | 0.62 cup | 0.62 |
| 100 g | 0.83 cup | 0.83 |
| 125 g | 1 cup | 1.04 |
| 150 g | 1¼ cups | 1.25 |
| 175 g | 1.46 cups | 1.46 |
| 200 g | 1⅔ cups | 1.67 |
| 250 g | 2.08 cups | 2.08 |
| 300 g | 2½ cups | 2.5 |
| 400 g | 3⅓ cups | 3.33 |
| 500 g | 4.17 cups | 4.17 |
Why bread flour weighs what it does
A cup of bread flour lands near 120 grams because the particle size and starch granules pack much like all-purpose, despite the higher protein content (12 to 14 percent vs. 10 to 11). Protein is light, so the extra gluten-forming wheat does not meaningfully raise weight per cup. What actually shifts the number is method and humidity: dipping the cup into the bag compresses the flour and can add 30 grams, while flour that has settled during shipping reads heavier than a freshly opened, fluffed bag. King Arthur's bread flour is famously higher-protein and behaves slightly stiffer in the cup.
How to measure bread flour
Use spoon-and-level. Stir the flour in the bag to loosen it, spoon it lightly into the cup without tapping or shaking, then sweep the excess off with a straight edge. Never scoop directly with the measuring cup, which packs in extra. For yeasted doughs, a scale set to 120g per cup removes all the guesswork.
Common mistake
Treating bread flour and all-purpose as interchangeable by volume, then scooping straight from the bag. Both weigh 120g per cup, but the scoop method packs in 20 to 30 extra grams. In a high-hydration dough that surplus tightens the gluten, giving a dense, dry loaf instead of an open crumb.
Other cup sizes
| Cup type | 1 cup of bread flour |
|---|---|
| US cup (240 ml) | 120 g |
| Metric cup (250 ml) | 125 g |
| Australian / South African cup (250 ml) | 125 g |
| Imperial cup (284 ml) | 142 g |
Where it matters
Bread flour is the backbone of yeasted bakes: sandwich loaves, baguettes, bagels, pizza dough, and chewy dinner rolls where strong gluten gives structure and chew. Accuracy matters most in lean, high-hydration doughs, where even 10 percent extra flour stiffens the dough, slows the rise, and flattens the crumb.
FAQ
Is bread flour the same weight per cup as all-purpose flour?
Yes, both are about 120 grams per US cup. The difference between them is protein content and gluten strength, not density, so you can swap weights one-to-one even though the doughs behave differently.
Why does my cup of bread flour weigh more than 120 grams?
You are almost certainly scooping the cup directly into the bag, which compacts the flour. Dipping and packing can push a single cup to 140 or 150 grams. Spoon it in lightly and level off for a true 120.
Can I use a scale instead of cups for bread?
Absolutely, and you should. Weighing at 120g per cup is the single biggest accuracy upgrade for bread, since yeasted doughs are sensitive to hydration ratios that volume measuring throws off.
Does sifting bread flour change the grams per cup?
Yes. Sifting aerates the flour, so a sifted cup can drop to around 110 grams or less. If a recipe says sifted, sift first then measure; if not, measure then sift.