There are about 8.8 cups in a kilogram of self-rising flour — approximately, because the figure depends on how the flour is measured. One US cup of self-rising flour weighs 113 g spooned and levelled, so 1,000 g divided by 113 g gives about 8.85 cups. That is the short answer, and the rest of this guide explains where the number comes from, how much it moves when the measuring method changes, and how to use it in real recipes — from a single cake to a bakery-scale bake.

Self-rising flour is all-purpose flour with the leavening already mixed in — baking powder and salt — and a cup weighs about 113 g, so a kilogram gives about 8.8 cups. That is slightly lighter than plain all-purpose flour, because the baking powder is lighter than flour. The kilogram figure is the same kind of number, but the recipes are different: self-rising flour is for quick breads, scones and pancakes, where the leavening is built in and the baker does not add more.

Every figure on this page is labelled approximate, and for good reason: cup measurements vary with packing, moisture and the size of the pieces. When a recipe depends on the amount — a cake, a loaf of bread, a jam that has to set — weigh the ingredient on a kitchen scale instead of trusting the cup. The scale is the only measuring tool that does not care how you filled the cup.

The conversion at a glance

One cup of self-rising flour weighs 113 g spooned and levelled. A kilogram is 1,000 g, so the arithmetic is 1,000 ÷ 113 = about 8.85 cups. The table below gives the cup equivalents for the amounts you are most likely to meet, whether you are scaling a recipe up or working out how far a bag will go. All figures are approximate, and all of them use the same 113 g per cup.

Amount Grams Cups (approx.) Tablespoons (approx.)
100 g 100 g 0.9 cups 14 tbsp
250 g 250 g 2.2 cups 35 tbsp
500 g 500 g 4.4 cups 71 tbsp
1 kg 1000 g 8.8 cups 142 tbsp
2 kg 2000 g 17.7 cups 283 tbsp
5 kg 5000 g 44.2 cups 708 tbsp

A single tablespoon of self-rising flour weighs about 7.1 g, and a teaspoon about 2.4 g — useful when a recipe calls for a spoonful rather than a cup. Note that a kilogram is about 2.2 lb, so the same kilogram works out to about 8.8 cups by the pound route as well: the two routes agree, because they are the same arithmetic with the same density. If you buy flour in pounds rather than kilograms, one pound of self-rising flour is about 4.0 cups.

Worked examples

A kilogram of self-rising flour and a month of scones

Scones are the classic use for self-rising flour. A batch of 12 scones needs about 3 cups, about 339 g, and a kilogram covers nearly three batches. Do not add extra baking powder: self-rising flour already contains it, and doubling the leavening makes scones rise fast and then collapse, with a bitter, soapy taste. The flour does the work — your job is to handle the dough lightly and bake it hot.

A soda bread for the week

Soda bread is the quick loaf that self-rising flour was made for. A loaf needs about 4 cups, about 452 g, mixed with buttermilk and baked within minutes. A kilogram makes two loaves with a little left over. Mix the dough quickly and get it into the oven fast: the baking powder starts working the moment it touches liquid, and a dough that sits on the counter loses its rise before it reaches the oven.

A pancake morning for the family

Pancakes are the everyday use for self-rising flour. A batch for four needs about 2 cups, about 226 g, and a kilogram covers four batches. The built-in leavening makes the pancakes fluffy without any extra baking powder — but it also means the batter should be used immediately, because the leavening loses power as it sits. Mix the batter, cook it straight away, and do not keep it for later.

How the figure is measured

The headline figure comes from the CookScale ingredient table, which lists self-rising flour at 113 g per US cup (236.6 ml), spooned and levelled, sourced from King Arthur Baking with high confidence. All-purpose flour with baking powder and salt already mixed in. The table's uses for self-rising flour are: Quick breads, scones, pancakes and biscuits.

The method matters more than most people realise. Spooned and levelled is the standard for this ingredient, and a different method gives a different weight: scooping instead of spooning compresses dry ingredients and can add 10–20% to the weight of a cup, while packing a sticky ingredient can add even more. That is why this guide states the method alongside every figure, and why the headline number is always labelled approximate. If you measure differently from the stated method, expect a different result — and if the recipe matters, weigh the ingredient instead.

One practical consequence: never convert in the wrong direction by accident. To go from cups to grams, multiply the cups by 113. To go from grams to cups, divide the grams by 113. To go from kilograms to cups, divide the grams (1,000 per kilogram) by 113. Keep the 113 g figure in mind and the rest is simple division — but always check the result against a scale when the bake depends on it.

Practical guidance

The mistake is adding baking powder to a recipe that already uses self-rising flour, or using self-rising flour in a yeasted recipe. Self-rising flour already contains baking powder and salt, so adding more leavening makes the bake rise too fast, collapse and taste bitter. And in a yeasted bread, the baking powder interferes with the yeast and the salt throws off the balance. Use self-rising flour only in recipes written for it, and plain flour everywhere else.

Storage: Airtight container, cool and dry; use within 6 months so the raising agents stay active. Weighing the ingredient before you store it, and writing the weight on the container, saves a conversion later: a tub labelled '450 g' tells you instantly that it holds about 8.8 cups, without any measuring at all.

When you do not have a scale: use the cup, but use it carefully. Spoon the ingredient into a dry measuring cup — never scoop from the bag — and level the top with the back of a knife without tapping or shaking the cup. For sticky or wet ingredients, use a liquid measuring jug and read the level at eye height, or lightly oil the cup so the ingredient releases cleanly. Accept that the result will be approximate, and if the recipe is a cake, a loaf or a jam, borrow a scale: it is the single most useful tool in baking, and it costs less than a bag of the flour it measures.

Frequently asked questions

How many cups are in 1 kg of self-rising flour?

About 8.8 cups. One cup of self-rising flour weighs 113 g spooned and levelled, and a kilogram is 1,000 g, so 1,000 divided by 113 gives about 8.8 cups. A 500 g bag is about 4.4 cups and a 2 kg bag about 17.7 cups. The figure is slightly lighter than all-purpose flour (120 g per cup) because the baking powder mixed into the flour is lighter than flour itself.

Can I make self-rising flour from plain flour?

Yes. Add 2 teaspoons of baking powder and half a teaspoon of salt to each cup of all-purpose flour (120 g), and whisk them together thoroughly. The homemade version weighs about the same per cup — roughly 113–115 g — so the kilogram conversion is close. Use it within a few weeks: the baking powder loses power over time, and self-rising flour kept for months does not rise properly.

How long does self-rising flour keep?

About 6 months in an airtight container in a cool, dry place — shorter than plain flour, because the baking powder loses its power over time. After six months, test it before baking: drop a teaspoon into hot water, and if it fizzes vigorously it is still active. A kilogram used within a month or two is fine; a kilogram kept for a year will give flat scones.

Should I weigh self-rising flour or measure it in cups?

Weigh it whenever the recipe matters. One cup of self-rising flour weighs 113 g spooned and levelled, but that figure assumes the stated method — and in practice, cups vary by 10–20% depending on how they are filled. A kitchen scale removes that variation entirely: 113 g is one cup, every time, regardless of who is measuring. Cups are fine for soups, salads and smoothies, where a little more or less makes no difference. For baking, jam, bread and anything where the ratio of ingredients decides the outcome, the scale is the right tool.

How accurate is the about 8.8 cups figure?

It is accurate to about plus or minus half a cup per kilogram, which is roughly the variation you get from different measuring methods and different batches of the ingredient. The figure is calculated from a single sourced density — 113 g per cup from King Arthur Baking, high confidence — and the arithmetic is exact: 1,000 ÷ 113 = 8.85 cups. The uncertainty is not in the maths but in the cup itself: a scooped cup weighs more than a spooned cup, and a packed cup weighs more than a loose one. Treat 8.8 cups as a planning figure and verify with a scale when it matters.

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