How many grams in a cup of bread flour?

1 cup of bread flour weighs 120 g by King Arthur Baking's chart. USDA lists 137 g, which is a much fuller cup.

Sources: King Arthur Baking ingredient weight chart, USDA FoodData Central · Checked October 10, 2026

Amount

Unit

120 g 4.2 oz

Sources range from 120 g to 137 g for 1 cup.

Converting a whole recipe?

Sous Chef converts every ingredient in a recipe to grams and millilitres in one tap, rounded to amounts you would actually weigh.

Bread flour cups to grams table

Using 120 g per US cup. A US cup is 236.6 mL; 1 cup is 16 tablespoons.

Bread flour cups to grams
US cups	Grams	Ounces	Tablespoons
⅛ cup	15 g	0.5 oz	2
¼ cup	30 g	1.1 oz	4
⅓ cup	40 g	1.4 oz	5.3
½ cup	60 g	2.1 oz	8
⅔ cup	80 g	2.8 oz	10.7
¾ cup	90 g	3.2 oz	12
1 cup	120 g	4.2 oz	16
1½ cups	180 g	6.3 oz	24
2 cups	240 g	8.5 oz	32
3 cups	360 g	12.7 oz	48
4 cups	480 g	16.9 oz	64

Why sources disagree

The two figures are 17 g apart per cup, about 14%. That is enough to make a bread dough noticeably stiffer or wetter. Flour compresses, so the gap most likely comes from how firmly the cup was filled. If your bread recipe gives grams, weigh them; if it only gives cups, fill the cup lightly and level it.

Source	Listed as	Grams per cup
King Arthur Baking ingredient weight chart Bread Flour	1 cup = 120 g	120 g
USDA FoodData Central Wheat flour, white, bread, enriched	1 cup = 137 g	137 g

Bold row is the figure the calculator uses. Figures listed for a smaller measure are multiplied up to one cup.

How to measure bread flour accurately

Fluff the flour with a spoon, then spoon it into the cup instead of scooping, which packs it.
Weigh on a digital scale when you can, since cup scoops vary from cook to cook.
If you use cups, fill the same way every time so your results stay consistent.

Convert the whole recipe, not one line

Converting a recipe one ingredient at a time is where mistakes slip in. Sous Chef imports a recipe from a link or pasted text, then converts every ingredient at once: dry ingredients and butter to grams, liquids to millilitres. Tap again to go back to cups.

US recipe

2¼ cups all-purpose flour
1 cup butter, softened
¾ cup brown sugar, packed
1½ cups milk

In Sous Chef, after "Convert to metric"

275 g all-purpose flour
225 g butter, softened
170 g brown sugar, packed
350 ml milk

Example output. Sous Chef rounds to amounts you would actually weigh, so its numbers can differ by a few grams from the table above.

Common questions

How many grams is half a cup of bread flour?

Half a cup of bread flour is about 60 g, using 120 g per cup.

How many grams is 1 tablespoon of bread flour?

1 tablespoon of bread flour is about 8 g, since 1 cup is 16 tablespoons and 120 g per cup divided by 16 is 8 g.

More conversions

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