BMI for Asians: Why Lower Cut-Offs Matter for Your Health
BMI for Asians uses lower cut-offs of 23 and 27.5. See why, what India's guidelines say and what your number means. Check yours free.
Written by HealthSensibly Editorial TeamReviewed by the HealthSensibly editorial teamUpdated
BMI for Asians uses lower action points than the standard chart because health risks such as type 2 diabetes and heart disease start rising at a lower weight. The WHO suggests a BMI of 23 as the point where risk increases and 27.5 as high risk, while Indian guidelines treat 23 to 24.9 as overweight and 25 or above as obese.
Why the standard BMI chart does not fit everyone
Body mass index is your weight in kilograms divided by the square of your height in metres. It is quick, cheap and useful for comparing large groups. For example, if you weigh 65 kg and stand 1.62 m tall, your BMI is 65 divided by 2.62 (1.62 × 1.62), which comes to about 24.8. On a standard chart that looks normal. On the Asian and Indian scales, it already signals increased risk. The same person, the same weight, but a very different message. This is exactly why the choice of chart matters for anyone of Indian, Pakistani, Bangladeshi, Sri Lankan, Chinese or other Asian background, whether you live in Ahmedabad, London or New Jersey. The familiar cut-offs, 18.5 for underweight, 25 for overweight and 30 for obesity, came largely from research on people of European descent.
Over the years, studies across Asia found something important. At the same BMI, many Asian adults had a higher percentage of body fat and more fat stored around the organs. They also developed type 2 diabetes, high blood pressure and abnormal cholesterol at lower BMI values than European groups. A BMI of 24 might look “normal” on a standard chart, yet for many Indians it already sits in a higher-risk zone.
What the WHO recommends for Asian populations
In 2004, a WHO expert consultation reviewed this evidence and published guidance in The Lancet. It kept the international categories for comparison across countries but added extra “public health action points” for Asian populations: 23, 27.5, 32.5 and 37.5.
In everyday terms, the two most useful lines are:
- 23: risk begins to increase. This is a good time to make changes.
- 27.5: high risk. A medical review and a clear plan are recommended.
The consultation noted that the exact cut-off varies among different Asian groups, so countries were encouraged to choose the points that best fit their own people. You can see where you fall using our Asian BMI calculator, which shows both the standard and Asian categories side by side.
India’s guidance on BMI and waist size
Indian consensus guidelines, published in 2009 by a panel of experts and widely used by doctors across the country, set these categories for adults:
| Category | Standard (WHO international) | WHO Asian action points | Indian consensus guidelines |
|---|---|---|---|
| Underweight | Below 18.5 | Below 18.5 | Below 18.0 |
| Normal / acceptable | 18.5 to 24.9 | 18.5 to 22.9 | 18.0 to 22.9 |
| Overweight / increased risk | 25 to 29.9 | 23 to 27.4 | 23.0 to 24.9 |
| Obese / high risk | 30 and above | 27.5 and above | 25 and above |
The same guidelines advise measuring waist circumference, with risk rising at 90 cm or more in men and 80 cm or more in women. In the UK, the NHS now also uses lower thresholds for people of South Asian, Chinese, Black and Middle Eastern backgrounds, treating a BMI of 23 to 27.4 as overweight and 27.5 or above as obese.
Body-fat distribution: the “thin-fat” Indian
Doctors sometimes describe a common South Asian pattern as “thin-fat” or “thin outside, fat inside”. A person may have slim arms and legs and a normal-looking BMI, yet carry extra fat around the waist and liver, with less muscle overall.
This deep belly fat, called visceral fat, is more active than fat under the skin. It is closely linked to insulin resistance, which can lead to prediabetes, type 2 diabetes, fatty liver and heart disease. That is why a family history of diabetes, combined with a growing waistline, deserves attention even when the scale looks fine.
Why muscle matters
Muscle helps your body use glucose well. Many Indian adults, especially women, do little strength training. Building muscle through squats, stair climbing, resistance bands or carrying groceries improves blood sugar control in a way BMI alone cannot show.
How to measure your waist correctly
Waist circumference adds what BMI misses. To measure it at home:
- Stand straight, feet together, and breathe out normally.
- Find the midpoint between your lowest rib and the top of your hip bone. For most people this is near the belly button.
- Wrap a soft measuring tape around this point, keeping it level and snug but not tight.
- Measure over bare skin or a thin layer, not over a saree pleat or thick jeans waistband.
Another simple check is the waist-to-height ratio. NICE in the UK suggests keeping your waist to less than half your height. If you are 160 cm tall, aim for a waist under 80 cm.
| Measure | Lower risk | Increased risk |
|---|---|---|
| Waist, Indian men | Under 90 cm (about 35.5 in) | 90 cm or more |
| Waist, Indian women | Under 80 cm (about 31.5 in) | 80 cm or more |
| Waist-to-height ratio | Below 0.5 | 0.5 or above |
What to do with your result
Once you have checked your number on the Asian BMI calculator, use it as a starting point rather than a verdict.
If your BMI is 18.0 to 22.9 and your waist is in range
Keep up your habits. Stay active for at least 150 minutes a week, as the WHO recommends for adults, and add strength exercises on two or more days.
If your BMI is 23 to 27.4 or your waist is above the limit
This is your early-action zone. Small, steady changes work best:
- Fill half your plate with sabzi and salad, a quarter with protein such as dal, paneer, curd, eggs, fish or chicken, and a quarter with roti, rice or millets.
- Swap refined snacks like farsan, biscuits and namkeen for roasted chana, fruit, sprouts or a bowl of curd.
- Choose ragi, jowar or bajra rotla sometimes, and go easy on ghee and oil in tadka.
- Cut sugary chai, cold drinks and sweets to occasional treats.
- Walk briskly for 30 minutes most days, such as after dinner.
Ask your doctor about a fasting blood sugar or HbA1c test, a blood pressure check and a lipid profile.
If your BMI is 27.5 or above
Book a medical review. Your doctor can screen for diabetes, high blood pressure, fatty liver and thyroid problems, and help you set a realistic target. Losing even 5 to 10 percent of your body weight can noticeably improve blood sugar and blood pressure.
If your BMI is below 18.0
Low weight has its own risks, including weak bones, anaemia and lower immunity. Add energy-dense, nutritious foods such as peanuts, chikki, banana, milk, eggs and dry fruits, and see a doctor if you are losing weight without trying. Our Food A–Z guide lists nutrients in common Indian foods.
Limits of BMI you should know
BMI cannot tell muscle from fat. A strong athlete may score as overweight, while an inactive person with little muscle may score as normal. It is also not designed for pregnant women, and children need age- and sex-specific charts. Older adults often lose muscle, so their BMI can look fine while strength declines. Combine BMI with waist size, blood tests and how you feel day to day. You will find more checks among our free health tools.
When to see a doctor
See a doctor soon if you notice:
- Unexplained weight loss or gain of more than about 5 percent over a few months.
- Excessive thirst, frequent urination, blurred vision or slow-healing wounds, which can point to diabetes.
- Dark, velvety skin patches on the neck or armpits, a sign of insulin resistance.
- Loud snoring with daytime sleepiness, which may suggest sleep apnoea.
- Swollen feet, breathlessness on mild effort, or a BMI of 27.5 or above with a family history of diabetes or heart disease.
Call emergency services straight away for chest pain or pressure, sudden weakness on one side of the body, slurred speech or severe breathlessness.
Frequently asked questions
What is a healthy BMI for Indians?
Under Indian guidelines, a healthy adult BMI is 18.0 to 22.9. Pair it with a waist under 90 cm for men and under 80 cm for women.
Is a BMI of 24 overweight for an Asian?
Yes. On WHO Asian action points it falls in the increased-risk band, and Indian guidelines classify 23 to 24.9 as overweight, even though the standard chart calls it normal.
Do the lower cut-offs apply to children?
No. Children and teenagers are assessed with age- and sex-specific growth charts, not adult BMI cut-offs. A paediatrician can interpret these.
Which matters more, BMI or waist size?
Both help. BMI reflects overall weight, while waist size shows belly fat, which is more closely linked to diabetes and heart risk. Checking both gives a better picture than either alone.
Sources
Clear, judgement-free explainers on health for women, men and families — checked against trusted sources.
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We check every tool and guide against the sources listed on the page and update it when guidance changes.
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Medical disclaimer. This article shares general health information only. It doesn’t replace diagnosis, treatment or advice from a medical professional — if you have symptoms or are worried, see a qualified doctor.
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