Convert Cake Flour from Ounces to Cup (US)

How many US cups is 1 ounce of cake flour?

1 ounce of cake flour (soft flour) is 0.23 US cups. 2 ounces of cake flour is 0.45 US cups. 4 ounces of cake flour is 0.91 US cups. 6 ounces of cake flour is 1.36 US cups. Use the converter below for any amount.

Cake flour is finely milled soft wheat with a low protein content of around 7 to 9%, giving a tender, fine crumb in sponge cakes, chiffon cakes, and biscuits. One metric cup (250 ml) weighs around 130 grams or 4.59 ounces. When a recipe calls for cake flour in cups but you only have scales, converting by weight gives the lift and softness the recipe expects.

Cake flour is sold in 1 kg or 500 g bags, while recipes mix cups, grams, and tablespoons. Weighing in grams gives more consistent results than scooping the powder-fine flour into a cup.

Also known as

  • soft flour
  • low-protein flour
  • soft-wheat flour

Plain flour carries more protein than cake flour (around 10 to 12% vs 7 to 9%), giving a sturdier crumb. They are close in weight (140 g vs 130 g per cup); for a quick stand-in when out of cake flour, sift 1 cup of plain flour with 2 tablespoons removed and replaced with cornstarch. See what 1 ounce of plain flour is in US cups.

Bread flour sits at the high end of protein (around 12 to 14%) while cake flour sits at the low end (7 to 9%), so they produce opposite textures. They differ by cup (150 g vs 130 g); they are not a straight swap, but blending half cake and half bread flour gives roughly the protein of plain flour. See what 1 ounce of bread flour is in US cups.

Self-raising flour is plain flour pre-mixed with baking powder, so it has more protein than cake flour (around 10 to 12% vs 7 to 9%) and a slightly heavier cup (140 g vs 130 g). They are not a swap; cake flour gives a tender crumb, self-raising flour supplies its own lift. See what 1 ounce of self raising flour is in US cups.

Out of cake flour? See cake flour substitutes →

No scale? The tool below gives a good estimate, but for exact bakes a digital kitchen scale removes the guesswork.

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Cake Flour Measurement Converter

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Result

0.23 Cup (US)

Common Cake Flour Conversions

Here are the most common cake flour conversions from ounces to cups (US).

OuncesCups (US)
1 oz0.23 cups (US)
2 oz0.45 cups (US)
3 oz0.68 cups (US)
4 oz0.91 cups (US)
5 oz1.14 cups (US)
6 oz1.36 cups (US)
8 oz1.82 cups (US)
10 oz2.27 cups (US)
12 oz2.73 cups (US)

Cake Flour Conversion Chart

The conversion chart below gives a quick reference for converting cake flour from Ounces to Cup (US) and other measurements.

ouncescup(US)cupgramslbkgtbsptsp
2.5 oz0.57 cup (US)0.55 cup70.87 g0.16 lb0.07 kg9.09 tbsp27.26 tsp
5 oz1.14 cup (US)1.09 cup141.75 g0.31 lb0.14 kg18.17 tbsp54.52 tsp
7.5 oz1.7 cup (US)1.64 cup212.62 g0.47 lb0.21 kg27.26 tbsp81.78 tsp
10 oz2.27 cup (US)2.18 cup283.49 g0.62 lb0.28 kg36.35 tbsp109.04 tsp

For the reverse conversion, see 1 US cup of cake flour in ounces.

Frequently Asked Questions

How many US cups is 1 ounce of cake flour?
1 ounce of cake flour is 0.23 US cups. The conversion is fixed, so 2 ounces is 0.45 US cups and 4 ounces is 0.91 US cups. These whole-ounce amounts are the ones recipes call for most with bulk ingredients, and the figure scales in a straight line as you multiply or divide. Use the converter above for any other amount, or the conversion chart on this page for the common ones. Open the cake flour converter
How many US cups is 2 ounces of cake flour?
2 ounces of cake flour is 0.45 US cups. The conversion is fixed, so 1 ounce is 0.23 US cups and 4 ounces is 0.91 US cups. These whole-ounce amounts are the ones recipes call for most with bulk ingredients, and the figure scales in a straight line as you multiply or divide. Use the converter above for any other amount, or the conversion chart on this page for the common ones.
What is 4 oz cake flour in US cups?
4 ounces of cake flour is 0.91 US cups. The conversion is fixed, so 1 ounce is 0.23 US cups and 2 ounces is 0.45 US cups. These whole-ounce amounts are the ones recipes call for most with bulk ingredients, and the figure scales in a straight line as you multiply or divide. Use the converter above for any other amount, or the conversion chart on this page for the common ones.
What is 6 oz cake flour in US cups?
6 ounces of cake flour is 1.36 US cups. The conversion is fixed, so 1 ounce is 0.23 US cups and 2 ounces is 0.45 US cups. These whole-ounce amounts are the ones recipes call for most with bulk ingredients, and the figure scales in a straight line as you multiply or divide. Use the converter above for any other amount, or the conversion chart on this page for the common ones.
Are cake flour and soft flour the same thing?
Yes. Soft flour is another name for cake flour, so they are the same ingredient and convert identically. 1 ounce of cake flour is 0.23 US cups under either name, and 2 ounces is 0.45 US cups. Recipes use the two names interchangeably, so you can follow either one without changing quantities or weighing any differently.

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