There are about 7 cups in a kilogram of rice flour — approximately, because the figure depends on how the flour is measured. One US cup of rice flour weighs 142 g spooned and levelled, so 1,000 g divided by 142 g gives about 7.04 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.

Rice flour is one of the heaviest flours on this site: a cup weighs about 142 g, so a kilogram gives only about 7 cups. That weight comes from the fine, dense milling of rice — the grains pack tightly with almost no air — and it is why rice flour gives gluten-free baking its structure. A kilogram of rice flour is a serious amount, and it is almost always used as part of a blend rather than on its own.

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 rice flour weighs 142 g spooned and levelled. A kilogram is 1,000 g, so the arithmetic is 1,000 ÷ 142 = about 7.04 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 142 g per cup.

Amount Grams Cups (approx.) Tablespoons (approx.)
100 g 100 g 0.7 cups 11 tbsp
250 g 250 g 1.8 cups 28 tbsp
500 g 500 g 3.5 cups 56 tbsp
1 kg 1000 g 7 cups 113 tbsp
2 kg 2000 g 14.1 cups 225 tbsp
5 kg 5000 g 35.2 cups 563 tbsp

A single tablespoon of rice flour weighs about 8.9 g, and a teaspoon about 3.0 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 7.0 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 rice flour is about 3.2 cups.

Worked examples

A kilogram of rice flour and a gluten-free baking month

Gluten-free flour blends are typically half rice flour, so a blend for a month of baking — say 2 kg of blend — needs 1 kg of rice flour, about 7 cups. A single cake using 2 cups of blend needs 1 cup of rice flour, about 142 g. Rice flour on its own makes a gritty, crumbly bake, so it is always blended with starches like tapioca and potato: the starches give the blend its binding and its tenderness, and the rice flour gives it body.

A tempura batter for a dinner party

Tempura is the recipe where rice flour shines. A batter for eight needs about 1.5 cups of rice flour, about 213 g, mixed with ice-cold water and used immediately. A kilogram covers four dinner parties. Keep the batter cold and lumpy: ice-cold water and minimal mixing are what make tempura shatteringly crisp, and a smooth, warm batter makes a soggy coating. Rice flour's lack of gluten is an advantage here — it cannot turn tough no matter how much you stir it.

A rice flour shortbread

Shortbread is the baking recipe that uses rice flour on its own. A batch of 24 shortbread fingers needs about 1 cup of rice flour, about 142 g, replacing a third of the wheat flour for a melt-in-the-mouth texture. A kilogram covers seven batches. The rice flour makes the shortbread sandy and delicate — which is exactly what you want in shortbread, and exactly what you do not want in bread. Use it where tenderness is the goal.

How the figure is measured

The headline figure comes from the CookScale ingredient table, which lists rice flour at 142 g per US cup (236.6 ml), spooned and levelled, sourced from King Arthur Baking with high confidence. Finely ground white rice; a staple of gluten-free baking. The table's uses for rice flour are: Gluten-free blends, shortbread and tempura batter.

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 142. To go from grams to cups, divide the grams by 142. To go from kilograms to cups, divide the grams (1,000 per kilogram) by 142. Keep the 142 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 using rice flour on its own in a bread recipe. Rice flour has no gluten, so a loaf made with 100% rice flour does not rise, does not hold its shape and crumbles when sliced. Rice flour belongs in blends — with tapioca starch, potato starch and xanthan gum — or in recipes where tenderness is the goal, like shortbread and tempura. The weight per cup is high, 142 g, so a cup-for-cup swap with wheat flour also adds weight the recipe did not expect.

Storage: Airtight container, cool and dry, up to 1 year. 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 7 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 rice flour?

About 7 cups. One cup of rice flour weighs 142 g spooned and levelled, and a kilogram is 1,000 g, so 1,000 divided by 142 gives about 7 cups. A 500 g bag is about 3.5 cups and a 2 kg bag about 14.1 cups. Rice flour is one of the heaviest flours, so a kilogram gives fewer cups than a kilogram of wheat flour.

Is rice flour the same as glutinous rice flour?

No, and the difference matters. Ordinary rice flour is made from long-grain rice and is used in baking and tempura; glutinous rice flour is made from sticky rice and is used in Asian desserts like mochi, where its chewiness is the point. They weigh similarly per cup, but they behave completely differently — glutinous rice flour makes a sticky, chewy dough, while ordinary rice flour makes a crumbly one. Do not swap them.

Why is rice flour gritty?

Because rice is a hard grain and it mills into fine but angular particles that do not soften the way wheat flour does. The grittiness is most noticeable in cakes, where it can feel sandy on the tongue. Blending rice flour with starches reduces the grit, and letting the batter rest for 30 minutes before baking lets the rice flour hydrate and softens the texture noticeably.

Should I weigh rice flour or measure it in cups?

Weigh it whenever the recipe matters. One cup of rice flour weighs 142 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: 142 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 7 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 — 142 g per cup from King Arthur Baking, high confidence — and the arithmetic is exact: 1,000 ÷ 142 = 7.04 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 7 cups as a planning figure and verify with a scale when it matters.

Related pages