Cake Flour — Measurement Converter
1 cup of cake flour weighs about 114 g. Half a cup is 57 g, a tablespoon about 7.13 g, and a full cup is 4.02 ounces on a scale.
💡 Tip: Cake flour has less protein than all-purpose, for a tenderer crumb. No box? Per cup, remove 2 tbsp AP flour and replace with 2 tbsp cornstarch, then sift.
Cake Flour cup measurements, in grams
| Cups | Grams | Ounces |
|---|---|---|
| 1/4 | 28.5 | 1.01 |
| 1/3 | 38 | 1.34 |
| 1/2 | 57 | 2.01 |
| 2/3 | 76 | 2.68 |
| 3/4 | 85.5 | 3.02 |
| 1 | 114 | 4.02 |
| 1 1/2 | 171 | 6.03 |
| 2 | 228 | 8.04 |
| 2 1/2 | 285 | 10.1 |
| 3 | 342 | 12.1 |
| 4 | 456 | 16.1 |
Cake flour vs all-purpose: weight and protein
Cake flour is milled from soft wheat to about 7–9% protein, well below all-purpose flour's 10–12%. Less protein means less gluten, which is what gives cakes their fine, tender crumb. It is also milled finer, so a cup weighs about 114g versus 120g for all-purpose.
No cake flour on hand? For each cup, measure 1 cup of all-purpose flour, remove 2 tablespoons, and swap in 2 tablespoons of cornstarch. Sift several times so the cornstarch is evenly distributed before using.
Cake Flour by weight: grams to cups
| Grams | Amount | Ounces |
|---|---|---|
| 25 | 1/4 cup | 0.88 |
| 50 | 1/2 cup | 1.76 |
| 100 | 7/8 cup | 3.53 |
| 125 | 1 1/8 cups | 4.41 |
| 150 | 1 1/3 cups | 5.29 |
| 175 | 1 1/2 cups | 6.17 |
| 200 | 1 3/4 cups | 7.05 |
| 250 | 2 1/4 cups | 8.82 |
| 300 | 2 5/8 cups | 10.6 |
| 400 | 3 1/2 cups | 14.1 |
| 500 | 4 3/8 cups | 17.6 |
For smaller amounts: a tablespoon of cake flour is about 7.13 g, and a teaspoon about 2.38 g.
How cake flour compares with other flours & starches
114 g per cup places cake flour in the middle of its category — lighter than '00' flour (116 g) and heavier than spelt flour (98 g).
That gap matters when you substitute by volume: use a cup of '00' flour where the recipe wanted cake flour and you have added about 2 g extra — 2% more than intended. Weighing instead of scooping removes the problem.
Frequently asked questions
- How many grams is 1 cup of cake flour?
- Reckon on 114 grams per US cup of cake flour — about 4.02 ounces.
- How many grams is 2 cups of cake flour?
- 2 cups of cake flour is 228g (at 114g per cup), and 3 cups is 342g.
- How many cups is 150g of cake flour?
- 150g of cake flour is about 1⅓ cups (150 ÷ 114 = 1.32).
- How do I substitute all-purpose flour for cake flour?
- For each cup of cake flour, measure 1 cup of all-purpose flour, take out 2 tablespoons, and replace them with 2 tablespoons of cornstarch. Sift two or three times. This lowers the protein and mimics cake flour's tender crumb.
- Is cake flour lighter than all-purpose flour?
- Slightly. Cake flour weighs about 114g per cup versus 120g for all-purpose, because it is milled finer and has less protein.
- Is cake flour the same as self-rising flour?
- No. Cake flour is a low-protein flour with no leavening added. Self-rising flour has baking powder and salt mixed in. Do not swap one for the other without adjusting the recipe.
- How many cups is 100g of cake flour?
- 100 grams of cake flour is about 7/8 cup.
- How many grams is a tablespoon of cake flour?
- About 7.13 g per tablespoon — there are 16 tablespoons in a cup.
- Why do my numbers differ slightly?
- Flour compresses. Dipping the cup into the bag can pack in 20% more than spooning it in loosely and levelling the top, and sifting first makes it lighter still. A scale removes the guesswork.