All-Purpose Flour Measurements and Conversions

Answer

125 g

1 US cup of all-purpose flour weighs about 125 grams (4.41 oz), according to USDA FoodData Central.

1 tbsp ≈ 7.81 g · 1 tsp ≈ 2.6 g

All-purpose flour: cups to grams and ounces

All-purpose flour by volume and weight (USDA household portion "1 cup"; USDA does not say whether the cup was spooned or scooped)
Amount	Grams	Ounces
1/8 cup	15.6 g	0.551 oz
1/4 cup	31.3 g	1.1 oz
1/3 cup	41.7 g	1.47 oz
1/2 cup	62.5 g	2.2 oz
2/3 cup	83.3 g	2.94 oz
3/4 cup	93.8 g	3.31 oz
1 cup	125 g	4.41 oz
1 1/2 cups	188 g	6.61 oz
2 cups	250 g	8.82 oz
1 tablespoon	7.81 g	0.28 oz
1 teaspoon	2.6 g	0.092 oz

All-Purpose Flour Conversions - Cups, Tbsp and Grams — What 1 cup, 1/2 cup, 1/3 cup, 1/4 cup, 1 tablespoon and 1 teaspoon of all-purpose flour weigh, from USDA FoodData Central.

Other kinds of all-purpose flour

Grams in 1 US cup (USDA FoodData Central)
Kind	Grams per cup	FDC ID
unbleached all-purpose flour	125 g	168936
self-rising flour	125 g	168895

How to measure all-purpose flour accurately

Without a scale, the spoon-and-level method gives the most repeatable cup of flour:

Stir the flour in its bag or bin to loosen it.
Spoon it into a dry measuring cup until it mounds over the rim.
Sweep off the excess with the back of a knife, without tapping or shaking the cup.

Dipping the cup straight into the bag packs the flour down, so the same cup ends up holding more of it. That is why one cook's cup of flour can weigh more than another's. USDA's figure does not say whether its cup was spooned or scooped, so treat it as a typical value rather than a fixed rule.

Sifting works the other way: it adds air, and a sifted cup weighs less. USDA has no sifted value for all-purpose flour, so this page does not give one. Read the wording closely, because "1 cup sifted flour" means sift first and then measure, while "1 cup flour, sifted" means measure first and sift afterward.

For bread, cakes and any recipe written in grams, weigh the flour instead. A scale also lets you follow UK recipes that list plain flour in grams without converting anything.

Find out how much a cup of all-purpose flour weighs in grams and ounces. Convert all-purpose flour between cups, tablespoons, grams and ounces. — A cup of all-purpose flour weighs 125 g; a cup of granulated sugar 200 g and a cup of butter 227 g (USDA).

How many calories are in a cup of all-purpose flour?

One cup of all-purpose flour (125 g) has about 455 calories, 12.9 g of protein, 1.2 g of fat and 95.4 g of carbohydrate, according to USDA FoodData Central.

Calories and nutrients in all-purpose flour by measure (USDA FoodData Central)
Measure	Grams	Calories	Protein (g)	Fat (g)	Carbs (g)	Sugars (g)	Sodium (mg)
1 cup	125	455	12.9	1.2	95.4	0.3	3
1 tablespoon	7.8	28	0.8	0.1	6	0	0
1 teaspoon	2.6	9	0.3	0	2	0	0
1 ounce	28	103	2.9	0.3	21.6	0.1	1
100 grams	100	364	10.3	1	76.3	0.3	2

Calories and nutrients in 1 cup of other kinds of all-purpose flour
Kind	Grams	Calories	Protein (g)	Fat (g)	Carbs (g)	Sugars (g)	Sodium (mg)
unbleached all-purpose flour	125	455	12.9	1.2	95.4	0.3	3
self-rising flour	125	443	12.4	1.2	92.8	0.3	1,491

USDA’s values per 100 grams, scaled to each measure; a dash means USDA lists no value. Records: FDC 168894 (Wheat flour, white, all-purpose, enriched, bleached); FDC 168936 (Wheat flour, white, all-purpose, enriched, unbleached); FDC 168895 (Wheat flour, white, all-purpose, self-rising, enriched), checked Sep 28, 2026.

Plain flour, self-rising flour and metric cups

All-purpose flour is sold as plain flour in the UK. USDA gives the same cup weight for bleached and unbleached all-purpose flour and for self-rising (self-raising) flour, as the table above shows. The weights match, but self-rising flour already contains leavening and salt, so it cannot stand in for plain flour one for one.

Cup and spoon sizes also change the numbers. If a recipe uses a metric cup (250 ml), expect about 132 grams of flour in it rather than the US figure. A metric tablespoon (15 ml) holds about 7.9 grams, and a US tablespoon about 7.8 grams.

Other flours, such as bread, cake or whole wheat flour, have their own weights. Do not use the numbers on this page for them.

All-purpose flour: questions

How much does 1 cup of flour weigh?

USDA lists a cup of all-purpose flour at 125 grams, or 4.4 ounces. Your own cup may land a little above or below that. A scooped cup usually runs heavier than a spooned one, and a sifted cup runs lighter.

How many ounces are in 1 cup of flour?

It depends on which ounce you mean. By volume, every cup holds 8 fluid ounces. By weight, the flour inside comes to only about 4.4 ounces, a little over half of that, because flour is light and full of air.

Is 8 oz of flour 1 cup?

No, 8 ounces of flour by weight fills about 1.81 cups, a bit more than 1 3/4 cups. A cup equals 8 fluid ounces only as a measure of space, and the flour in that space weighs much less.

Is 2 cups of flour 16 oz?

No, two cups of all-purpose flour weigh about 8.8 ounces. They hold 16 fluid ounces of space, which is where the sixteen comes from.

A full pound of flour takes about 3.6 cups, and a 5 lb bag holds about 18 cups. See the cups to grams converter for other amounts.

Source: USDA FoodData Central, FDC ID 168894 (Wheat flour, white, all-purpose, enriched, bleached; portion “1 cup” = 125 g). USDA gives only a "1 cup" portion for all-purpose flour; there is no sifted or spooned value.

Sources: Weights: USDA FoodData Central · Last reviewed Sep 27, 2026 · Report an error