South Asian BMI & Ideal Weight Calculator

Calculate your Body Mass Index (BMI) using the strict WHO Asian thresholds (where overweight starts at 23.0) to get an accurate view of your health risk, calibrated to Sri Lankan Ministry of Health guidelines.

Your BMI Score

24.2
Risk to overweight
Your weight is above the optimal range. Try to bring down it with more exercises and correct dietary practices.
Target Normal Weight Range:53.5 - 66.2 kg
Suggested Loss:3.8 kg
Source: Thresholds and medical advice presented above are strictly calibrated to the official guidelines published by the Health Promotion Bureau, Ministry of Health, Sri Lanka.

Why Sri Lanka uses lower BMI thresholds

At the same BMI, people of South Asian descent carry more body fat and a higher risk of type 2 diabetes and cardiovascular disease than the European populations the original cut-offs were derived from. The WHO therefore recommends lower action points for Asian populations, and Sri Lankan health guidance follows them.

The practical effect is that the healthy band ends at 22.9 rather than 24.9. A BMI of 24 is inside the normal range on the international scale and above it on this one, which is why an international BMI calculator can give a Sri Lankan reader false reassurance.

BMI categories used by this calculator
BMICategoryInternational equivalent
Below 18.5UnderweightUnderweight
18.5 - 22.9Normal weightNormal (to 24.9)
23.0 - 24.9Risk to overweightStill normal
25.0 - 29.9OverweightOverweight
30.0 and aboveObesityObesity

How the healthy weight range is worked out

The range is the BMI formula run backwards. Multiplying 18.5 and 22.9 by your height in metres squared gives the lightest and heaviest weights that fall inside the healthy band for your height.

For someone 1.65 m tall, that is 50.4 kg to 62.3 kg. For someone 1.75 m tall it is 56.7 kg to 70.1 kg. The band widens with height because the formula squares it.

Healthy weight range by height, on the 18.5 to 22.9 band
HeightHealthy range
1.55 m (5 ft 1 in)44.4 - 55.0 kg
1.65 m (5 ft 5 in)50.4 - 62.3 kg
1.75 m (5 ft 9 in)56.7 - 70.1 kg
1.85 m (6 ft 1 in)63.3 - 78.4 kg

What BMI does not tell you

BMI is a ratio of weight to height and nothing more. It cannot see where fat sits on the body, and abdominal fat carries more metabolic risk than the same weight distributed elsewhere.

  • Waist circumference and waist-to-height ratio add information BMI misses.
  • Muscular people are routinely classified as overweight by BMI.
  • It is not valid during pregnancy, and children need age-and-sex-specific charts.
  • A single reading matters less than the direction of travel over months.

What to check alongside BMI

BMI describes a ratio of weight to height and nothing else, so two people with identical readings can carry very different risk. Waist circumference is the most useful figure to read beside it, because abdominal fat is more strongly associated with cardiometabolic risk than total body mass, and the thresholds recommended for South Asian populations are lower than the international ones.

Blood pressure, fasting glucose, and a lipid profile add far more than a second decimal place on BMI ever will, particularly given the rates of type 2 diabetes and cardiovascular disease in Sri Lanka. A BMI inside the healthy band is not evidence that those are fine, which is why screening is recommended on age and risk factors rather than on body mass alone.

Treat the number here as a prompt for a conversation with a clinician rather than a verdict. Where it falls outside the healthy band, what matters next is the pattern of diet, activity, sleep, and family history, none of which a height and a weight can capture.

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Frequently asked questions

According to the WHO and Sri Lankan Ministry of Health, South Asians carry higher cardiovascular risks at lower BMI levels. The global standard flags overweight at 25.0, but the Asian standard flags it at 23.0.

The WHO recommends 18.5 to 22.9 for Asian populations, against 18.5 to 24.9 internationally. The lower ceiling reflects evidence that people of South and East Asian descent face raised cardiometabolic risk at a lower body mass than the international thresholds assume.

Weight in kilograms divided by height in metres squared. Someone 1.7 m tall weighing 65 kg has a BMI of 65 divided by 2.89, which is 22.5. Height in centimetres must be converted to metres first - using centimetres directly is the most common mistake.

No. BMI takes no account of body composition, so a muscular person can register as overweight while carrying little fat, and someone with low muscle mass can register as healthy while carrying a lot. It is a population screening measure, not an individual diagnosis.

Discuss it with a doctor rather than acting on the number alone. BMI is one input among several - waist measurement, blood pressure, blood glucose and lipids, family history, and how you actually live all matter, and a clinician can weigh them together in a way a calculator cannot.

The range this calculator shows is the weight that puts you between 18.5 and 22.9 BMI at your height. At 1.7 m that is roughly 53 to 66 kg. Treat it as a guide rather than a goal in itself, particularly if your build or muscle mass sits outside the average.

Not in this form. Children and adolescents are assessed against age- and sex-specific growth references rather than fixed adult cut-offs, because body composition changes throughout growth. Use the child growth charts your paediatrician or clinic uses.

Under the WHO Asian cut-offs, the overweight band begins at 23 rather than the 25 used internationally, and the obesity threshold is likewise lower. The lower boundary reflects raised cardiometabolic risk at a given body mass in Asian populations, not a stricter cosmetic standard.