Your Body Mass Index (BMI) estimates whether your weight is in a healthy range for your height. Enter your details below for an instant result — read both the global (WHO) and Asian-Indian (ICMR) interpretation, because the healthy range is lower for Indian bodies.
Tip: results update as you type.
Enter your height and weight to see your BMI and what it means for you.
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BMI is a screening estimate, not a diagnosis. It doesn't measure body fat directly or account for muscle, age, or pregnancy. A healthcare professional can interpret it for your body.
BMI (Body Mass Index) is a quick screening number that compares your weight to your height. It takes two measurements you already know and turns them into a single value you can track over time. Here's how to read it — and what the maths actually is.
Body Mass Index (BMI) is your weight in kilograms divided by the square of your height in metres (kg/m²). It estimates whether your weight sits in a healthy range for your height — but it is a screening signal, not a diagnosis.
Worked example A person who is 1.70 m tall and weighs 68 kg: 68 ÷ (1.70 × 1.70) = 68 ÷ 2.89 = 23.5 kg/m².
The same BMI number is read differently depending on which standard you use. For Indian and South Asian adults, the ICMR cut-offs flag risk earlier than the older WHO ranges — so a BMI that looks "borderline" globally may already sit in the overweight band here.
All values in kg/m². This calculator uses the ICMR column by default.
| Category | ICMR · Asian-Indian | WHO · global |
|---|---|---|
| Underweight | Below 18.5 | Below 18.5 |
| Healthy weight | 18.5 – 22.9 | 18.5 – 24.9 |
| Overweight | 23.0 – 24.9 | 25.0 – 29.9 |
| Obese | 25.0 and above | 30.0 and above |
ICMR–INDIAB and Indian consensus guidelines lower the thresholds because South Asians tend to carry more body fat and abdominal fat at the same BMI, with cardiometabolic risk appearing earlier. Full citations are listed in the Sources section below.
A BMI under 18.5 can mean you're carrying less weight than is healthy for your height. Sometimes that's natural build; sometimes it points to under-nutrition, a thyroid issue, or another underlying cause worth checking.
What to do next Focus on nutrient-dense Indian meals — dal, paneer, nuts, ghee, whole grains — rather than empty calories. If weight loss was unintentional, see a doctor to rule out a cause.
Your weight sits in the healthy range for your height under Indian cut-offs. This is associated with lower risk of weight-related conditions — though BMI alone doesn't capture everything, such as where fat is stored.
What to do next Keep the habits that got you here: regular activity, balanced meals, and an eye on your waist measurement as well as the scale.
Under ICMR cut-offs, this range signals raised risk for type 2 diabetes, high blood pressure, and heart disease — earlier than the global standard would flag it. The good news: small, early changes here are highly effective.
What to do next A modest 5–7% weight reduction meaningfully lowers risk. Pair an honest look at foods to limit for diabetes with regular movement — a daily walk is a sustainable start.
A BMI of 25 or above (Indian cut-off) is linked to higher risk of several conditions — but risk is reducible, and weight is manageable with the right support. Many people improve their health markers well before reaching an "ideal" weight.
What to do next This is worth discussing with a doctor, who can check related markers and tailor a plan. Understanding how obesity affects long-term health is a practical first step.
Because South Asians often carry fat around the abdomen, waist size adds important context BMI misses. As a guide, risk rises above 90 cm for men and 80 cm for women. Reading both together gives a far truer picture than either alone.
A BMI number is only useful if it leads somewhere. Here's how to turn your result into a practical next step — and the specific signs that mean it's worth talking to a healthcare professional rather than waiting.
Consider booking a consultation if any of these apply to you:
A doctor can read your BMI alongside your history and other tests, and tell you what it means for you specifically — something no calculator can do.
BMI is useful because it's simple — and limited for the same reason. It was never designed to judge one individual's health. Knowing what it misses is what lets you use it well, rather than worry about a single number.
BMI weighs everything together. A muscular athlete and someone carrying excess fat can share the same BMI, even though their health profiles differ completely.
Fat around the abdomen carries more risk than fat on the hips or thighs. BMI can't see this — which is exactly why waist measurement matters alongside it.
Diet quality, fitness, sleep, blood sugar, and blood pressure all shape your health. Two people with the same BMI can be in very different shape underneath.
For these groups, a standard BMI category can be misleading. Treat the result as a rough flag and ask a professional to interpret it in context.
However your BMI reads today, it's one signal among many — and most weight-related risk is reducible with steady, realistic changes. If your result concerns you, that's a reason to talk to a doctor, not a reason to panic. This tool is for screening and education; it isn't a diagnosis or a substitute for professional medical advice.
Clear, India-first answers to the questions people ask most about Body Mass Index — what's healthy, what's obese, and how much the number really tells you.
For Indian and South Asian adults, a healthy BMI is 18.5 to 22.9 kg/m² under ICMR cut-offs. Overweight begins at 23 and obesity at 25 — lower than the global WHO thresholds, because health risks appear earlier in South Asian bodies.
BMI is your weight in kilograms divided by your height in metres squared (kg/m²). For example, a person who is 1.70 m tall and weighs 68 kg has a BMI of 68 ÷ (1.70 × 1.70) = 23.5. This calculator does the maths for you in metric or US units.
South Asians tend to carry more body fat and abdominal fat at the same BMI than other populations, so cardiometabolic risk appears at lower numbers. ICMR and Indian consensus guidelines lower the overweight threshold to 23 to flag this risk earlier.
No. BMI is a useful screening estimate but not accurate for everyone. It can mislead for athletes, pregnant women, older adults, children, and very tall or short people, because it cannot tell muscle from fat or account for body composition.
In India, a BMI of 25 kg/m² or above is classed as obese under ICMR cut-offs. This is lower than the WHO global threshold of 30, reflecting the earlier health risk seen in South Asian populations.
No. BMI does not measure body fat directly. It only compares weight to height, so it cannot distinguish fat from muscle or show where fat is stored. Waist circumference and body-fat measurements give a fuller picture.
As a guide, abdominal-obesity risk rises above 90 cm for Indian men and 80 cm for Indian women. Because South Asians often store fat around the abdomen, reading waist size alongside BMI gives a more accurate sense of risk.
Checking every few weeks under the same conditions — such as in the morning before eating — is enough to see a real trend. A single reading is only a snapshot; the direction of change over time tells you more than any one number.
Not necessarily. A normal BMI lowers the odds of weight-related conditions but does not rule out risk. Blood sugar, blood pressure, cholesterol, waist size, and lifestyle all matter, so a normal BMI is reassuring but not a complete health check.
The BMI formula and adult categories are the same for men and women. However, women naturally carry more body fat at the same BMI, so the number is interpreted alongside other measures like waist size rather than read in isolation.
This calculator and its guidance draw on the following authoritative sources. The Indian cut-offs follow ICMR and the Indian Consensus Group; the global cut-offs follow the WHO.
Medical disclaimer: This BMI calculator and its content are for informational and educational purposes only. They are not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider about your health. Read our full medical disclaimer.