If your recipe asks for 3/4 cup of cake flour, set your scale to about 90 g. That is three quarters of the 120 g that one full cup weighs spooned and levelled (King Arthur Baking). Below is the full table, three worked examples, and the measuring details that keep the number honest.
3/4 cup of cake flour in grams
| Amount | Grams (approx.) |
|---|---|
| 1/8 cup | 15 g |
| 1/4 cup | 30 g |
| 1/3 cup | 40 g |
| 1/2 cup | 60 g |
| 2/3 cup | 80 g |
| 3/4 cup | 90 g ← this page |
| 1 cup | 120 g |
| 1 1/2 cups | 180 g |
| 2 cups | 240 g |
All figures are approximate. One US cup of cake flour weighs 120 g spooned and levelled (King Arthur Baking), and every fraction above is calculated from that figure. When the result matters — a cake, a loaf, a sauce you cannot remake — verify with a kitchen scale.
Getting 3/4 cup of cake flour right without guessing
The reliable way to get 3/4 cup of cake flour is to weigh it. Put your bowl on the scale, press tare, and add cake flour until the display reads about 90 g. That is it — no levelling, no tapping, no guessing. Very finely milled, low-protein flour that gives cakes a tender, fine crumb. If you do not have a scale, use a 3/4 cup measure and the method the data was measured with: spooned and levelled. Spoon cake flour in loosely and level the top with a straight edge, and do not press it down. Expect the result to be approximate either way; when the recipe really matters, verify with a kitchen scale.
Worked examples
Example 1: scaling a family recipe down
A family recipe calls for 1 cups of cake flour and serves eight. You are cooking for two, so you need a quarter of that: 3/4 cup. Weigh out 90 g and you have the right share, without trying to divide a cup measure into quarters by eye. This is the most common reason people search for a 3/4 cup conversion at all.
Example 2: measuring cake flour for chiffon and delicate layer cakes
Chiffon and delicate layer cakes often needs a modest amount of cake flour, and 3/4 cup is a typical quantity. Weighing 90 g straight into the pan or bowl avoids dirtying a measuring cup and keeps the amount exact. If you are cooking by feel, remember that cake flour is very finely milled, low-protein flour that gives cakes a tender, fine crumb. so the weight, not the volume, is what the recipe writer was counting on.
Example 3: baking with a recipe from another country
Many recipes from the US list cake flour in cups while the rest of your kitchen works in grams. Converting 3/4 cup to 90 g lets you follow the recipe without converting every other ingredient back to cups. Keep the conversion table below bookmarked: the same 120 g-per-cup figure gives you every fraction from 1/8 cup to two cups.
How 3/4 cup of cake flour is measured
The figure of 90 g is based on cake flour measured spooned and levelled, following King Arthur Baking. One full cup weighs 120 g under that method, and 3/4 cup is simply that figure multiplied by 0.75.
King Arthur lists 120 g per cup; finely milled cake flour is sometimes quoted at 100 g per cup when sifted, so spoon and level rather than scooping. That is why the headline number is labelled approximate: it is a calculation from a published full-cup density, not a measurement of the exact spoonful in your kitchen.
If your cake flour was measured differently, the weight changes. A scooped cup packs more in; a sifted cup holds less; a packed cup of a sticky ingredient holds far more than a spooned one. The method matters as much as the number, which is why every conversion on this site states its method alongside its source. When a recipe matters — a celebration cake, a loaf of bread you have been planning, a sauce you cannot remake — weigh the cake flour on a kitchen scale and let the scale settle the argument. 90 g is a good target; the scale tells you when you have actually hit it.
King Arthur Baking is the source for the full-cup figure, and this site uses that value consistently across every cake flour page, so the quarter-cup, half-cup and full-cup figures all agree with each other. If you have seen a different number elsewhere, it almost certainly comes from a different method or a different source's rounding — not from a different ingredient.
Practical guidance for cake flour
Sponge cakes, chiffon and delicate layer cakes. That range of uses is exactly why the weight matters: the same 3/4 cup of cake flour behaves differently in a cake batter, where it must hydrate evenly, than in a bread dough, where it builds gluten. Weighing 90 g gives the recipe the amount its author tested, whatever you are making.
Storage changes the number too. Airtight container, cool and dry, up to 1 year. Flour that has sat in a humid kitchen absorbs moisture and weighs more per cup; flour that has been in the freezer and brought out cold can clump. Keep it sealed, bring it to room temperature before baking, and spoon it loosely when you measure by volume.
The most common failure with cake flour is a dry, heavy bake caused by too much flour. If your cakes keep coming out dense, weigh the flour for a few bakes and compare with your usual cup measure — most bakers find they have been adding 10–20 g extra per cup without realising it. 3/4 cup at 90 g is a small enough amount that the error is easy to miss and large enough, proportionally, to matter.
Common mistakes with 3/4 cup of cake flour
Forgetting to tare the scale. Weighing the bowl as well as the cake flour adds its weight to your reading, so always press tare with the empty bowl on the scale first.
Measuring over the mixing bowl. Spills fall into the recipe and cannot be taken out cleanly. Measure over the bag, the sink, or a spare plate instead.
Rounding the figure too aggressively. 90 g is already a rounded figure; rounding it again to 90 g is fine for most cooking, but for delicate baking keep the full figure.
If you do not have a scale
If you only have a 1-cup measure, fill it to the 3/4 cup line and level it. Read it at eye level on a flat surface; reading from above makes the line look lower than it is.
For sticky or pourable cake flour, lightly oil the measure first so it releases cleanly, and pour slowly so you can stop at the line.
Use a 3/4 cup measure if you have one. Fill it using the spooned and levelled method: spoon cake flour in, do not press it down, and level the top with the back of a knife.
Remember that any of these fallbacks is approximate. A kitchen scale is inexpensive, and it turns every conversion on this site — including this 90 g figure — from a good guess into a measurement you can trust.
Frequently asked questions
Does the weight of 3/4 cup of cake flour change if it is cold or warm?
Barely, for most purposes. Temperature changes the density of cake flour only slightly, and 90 g stays a good working figure. The bigger variables are how it was measured and how it was stored — humidity and packing change the weight far more than temperature does.
How much is 3/4 cup of cake flour in ounces?
3/4 cup of cake flour is about 3.2 oz by weight (since one ounce is 28.35 g). Ounces on a recipe usually mean weight, so this is the figure to use on a scale that reads in ounces.
How many grams is 3/4 cup of cake flour?
3/4 cup of cake flour is about 90 g, measured spooned and levelled and based on King Arthur Baking's figure of 120 g per cup. The figure is approximate — cake flour varies with brand, grind and humidity — so verify with a kitchen scale when the recipe matters.
Is 90 g exact for 3/4 cup of cake flour?
No. 90 g is an approximate figure calculated from King Arthur Baking's full-cup value of 120 g. cake flour does not have a single fixed density: King Arthur lists 120 g per cup; finely milled cake flour is sometimes quoted at 100 g per cup when sifted, so spoon and level rather than scooping. A kitchen scale gives you the true weight of what you actually added, which is why weighing beats converting.
Can I use 3/4 cup of cake flour in place of a full cup in a recipe?
Only if you are scaling the whole recipe down. 3/4 cup is a quarter of a cup, so replacing a full cup with 3/4 cup quarters the amount of cake flour and will change the recipe's structure, moisture or sweetness. If you want a smaller batch, scale every ingredient by the same factor.