Fibre in Rajma: Why One Katori Does So Much Work
Last reviewed: · What changed: Answers to common questions added.
Rajma is the single most fibre-dense dish that most North Indian households already cook every week. Raw kidney beans carry roughly 14–16 g of total dietary fibre per 100 g, so a katori of cooked rajma — about 30 g raw — delivers 4–5 g, plus resistant starch that behaves like fibre once the dish has cooled. Soaking and pressure cooking do not reduce it; they make it tolerable.
- A katori of cooked rajma gives about 4–5 g of fibre; a generous serving, 7–8 g.
- Rajma out-fibres every dal except whole chana, and matches it for protein.
- Cooking, cooling and reheating rajma increases resistant starch, which feeds gut bacteria.
- Soak 8–12 hours and discard the water; it removes the compounds that cause gas.
- Go slow if you are new to beans: a half katori daily for a week, then more.
Butter Coffee — All-in-One Nutrition Shake
25 g complete plant protein, 60+ superfoods, 26 vitamins & minerals, probiotics & digestive enzymes — in one 90-second shake.
Where rajma sits among the beans and dals
Rajma gets praised for protein — the protein in rajma page has those figures — but its fibre is the more unusual thing about it. Most dals lose their husk in milling; rajma keeps everything.
| Food | Fibre per 100 g |
|---|---|
| Rajma (kidney beans), raw | ~14–16 g |
| Kala chana (whole), raw | ~16–18 g |
| Kabuli chana, raw | ~11–13 g |
| Chana dal, raw | ~10–11 g |
| Moong dal (split), raw | ~8–9 g |
| Toor dal, raw | ~8–10 g |
| Masoor dal, raw | ~9–10 g |
| Lobia (black-eyed beans), raw | ~10–12 g |
Only whole chana beats it. Against the split, dehusked dals that make up most weekday meals, rajma carries roughly 50–80% more fibre per gram.
What a katori actually delivers
A katori of rajma curry holds roughly 30 g of raw beans once you account for the gravy. The conversion:
| Serving | Approximate fibre |
|---|---|
| 1 katori cooked (~30 g raw) | ~4–5 g |
| A generous rajma chawal plate (~50 g raw) | ~7–8 g |
| Rajma salad, 1 cup boiled | ~9–11 g |
Pair that with brown rice or a millet and the plate reaches 10–12 g — a third to half of the day's need in one sitting. With white rice the beans are doing almost all the work, which is still a good result.
Resistant starch: the fibre that is not on the label
Beans contain starch that resists digestion in the small intestine and ferments in the colon, where it feeds the bacteria that produce butyrate. Cooking rajma, cooling it in the fridge and reheating it roughly doubles the resistant starch. Leftover rajma is, in this one narrow sense, better than fresh.
This is the same mechanism behind the prebiotic effect described in the inulin and prebiotic fibre guide: feed the right bacteria and the gut does the rest.
Soaking, cooking and the gas question
Rajma causes wind because of raffinose-family oligosaccharides, which humans cannot digest and gut bacteria ferment enthusiastically. Three things reduce it:
- Soak 8–12 hours, then discard the soaking water and rinse.
- Pressure cook until fully soft; undercooked rajma is both gassier and harder to digest.
- Add hing, ajwain or ginger — traditional for a reason.
Soaking removes some oligosaccharides but not the fibre; the fibre is structural and stays in the bean. None of the three steps lowers the figures above.
If beans still cause real trouble, the IBS and FODMAP guide covers who should limit them and how to reintroduce them.
How to use rajma to fix a low-fibre week
Indian adults average well under the 25–40 g ICMR-NIN guidance, mostly because polished rice, refined atta and dehusked dals dominate the plate. Rajma twice a week is the cheapest correction available.
- Monday: rajma chawal — 7–8 g from the beans alone.
- Thursday: rajma salad with onion, tomato and lemon — 9–11 g.
- Any day: a half katori of boiled rajma folded into a vegetable sabzi.
For the other whole legume that matches it, fibre in chana has the kala chana figures. Drink an extra two glasses of water on bean days; fibre without water is what causes the discomfort people blame on the beans.
Where KABO fits in
Rajma twice a week does more for fibre than any supplement, and it costs less than a cup of coffee per serving. Beans, water and time are the whole prescription on this page.
A KABO serving carries 4 g of fibre and 8 billion probiotics alongside 25 g of complete plant protein and 26 vitamins and minerals. On the days when rajma is not on the table, it keeps fibre and protein in the day; on the days it is, it adds to a meal that is already doing the work.
Butter Coffee — All-in-One Nutrition Shake
25 g complete plant protein, 60+ superfoods, 26 vitamins & minerals, probiotics & digestive enzymes — in one 90-second shake.
Read next
- Protein in Rajma (Kidney Beans): Per Katori & Cooked
- Iron in Rajma: How to Actually Absorb It
- Fibre in Chana: Kala vs Kabuli vs Dal, Compared Properly
- Fibre in Moong Dal: The Gentle Dal, and Its One Weakness
- Fibre: How Much You Need & Best Sources (India)
- Fibre Intake Calculator: How Much Dietary Fibre Do You Need Per Day?
Frequently asked questions
How much fibre is in one katori of rajma?
About 4-5 g. A katori of cooked rajma represents roughly 30 g of raw kidney beans, which carry 14-16 g of fibre per 100 g. A generous rajma chawal portion with about 50 g of raw beans gives 7-8 g.
Is rajma higher in fibre than dal?
Yes, by a wide margin against split dals. Rajma carries roughly 14-16 g per 100 g against 8-10 g for moong, toor and masoor dal, because the dals lose their husk in milling and rajma keeps everything. Only whole kala chana beats it.
Does soaking rajma remove the fibre?
No. Soaking removes some of the oligosaccharides that cause gas, which is why it helps, but the fibre is part of the bean's structure and stays. Cooking softens it without removing it.
Why does rajma cause gas and how do I stop it?
Raffinose-family sugars in beans are fermented by gut bacteria. Soak 8-12 hours and discard the water, pressure cook until fully soft, add hing or ajwain, and start with half a katori daily for a week if you are not used to beans.
Is leftover rajma healthier than fresh?
For gut bacteria, slightly. Cooking, cooling and reheating increases resistant starch, which ferments in the colon and feeds butyrate-producing bacteria. The fibre content itself does not change.
Can I eat rajma every day?
Most people can, once their gut has adjusted. A katori a day is well within normal intake. People with IBS or recovering from gut surgery should build up slowly and follow their doctor's advice on legumes.
How much fibre is in 100 g of rajma?
Raw rajma (kidney beans) has about 14–16 g of fibre per 100 g. Values vary with variety and preparation.
How much fibre is in a generous rajma chawal plate (~50 g raw)?
About 7–8 g of fibre, according to the serving table on this page.
Is rajma a good source of fibre?
Raw kidney beans carry roughly 14–16 g of total dietary fibre per 100 g, so a katori of cooked rajma — about 30 g raw — delivers 4–5 g, plus resistant starch that behaves like fibre once the dish has cooled.
Rajma me kitna fibre hota hai?
Raw rajma (kidney beans) has about 14–16 g of fibre per 100 g, according to the table on this page.
Sources
- Longvah T et al., Indian Food Composition Tables 2017, ICMR-National Institute of Nutrition, Hyderabad. nin.res.in
- ICMR-NIN, Nutrient Requirements for Indians (RDA 2020) and Dietary Guidelines for Indians, 2024. nin.res.in
- Reynolds A et al., "Carbohydrate quality and human health: a series of systematic reviews and meta-analyses", The Lancet, 2019;393(10170):434-445.