Understand obesity through Indian eyes — with 12 interactive calculators to assess your health risk and chart your wellness journey.
What obesity is, how it's measured, and why it matters — especially for Indians.
Obesity is a chronic medical condition where excess body fat accumulates to the point of negatively affecting health. It is not simply a matter of "overeating" or "lack of willpower" — it is a complex disease influenced by genetics, environment, metabolism, behaviour, and socio-economic factors.
Obesity is clinically diagnosed using the Body Mass Index (BMI), which is calculated by dividing your weight in kilograms by the square of your height in metres.
Formula: BMI = Weight (kg) ÷ (Height in m)²
Example: A 70 kg person who is 1.65 m tall → BMI = 70 ÷ (1.65 × 1.65) = 25.7
Standard international BMI cutoffs (overweight ≥25, obese ≥30) do not apply to Asian Indian populations. Indians have higher body fat percentage at lower BMI values and are at greater risk of metabolic complications at lower BMIs.
For Indians, obesity is defined at BMI ≥25 (not ≥30) — this is based on the Consensus Guidelines by the International Diabetes Federation (IDF) and the Indian Council of Medical Research (ICMR).
| Category | BMI Range (Indian) | Risk |
|---|---|---|
| Underweight | < 18.5 | Low (but other risks) |
| Normal | 18.5 – 22.9 | Low |
| Overweight | 23.0 – 24.9 | Moderate |
| Obese Class I | 25.0 – 29.9 | High |
| Obese Class II | 30.0 – 34.9 | Very High |
| Obese Class III (Severe) | ≥ 35.0 | Extreme |
Source: WHO Asia-Pacific Guidelines, IDF Consensus for Indian Population
General obesity refers to overall excess body fat (measured by BMI). Abdominal (central) obesity refers to fat stored around the abdomen — this is more dangerous as it surrounds vital organs and is linked to insulin resistance, diabetes, and heart disease.
Indians are particularly prone to "TOFI" (Thin Outside, Fat Inside) — having normal BMI but excess abdominal fat. This is why waist circumference and waist-to-height ratio are critical additional measurements for Indians.
Waist-to-Height Ratio: Keep it below 0.5. Simply put, your waist circumference should be less than half your height.
Obesity in India has reached alarming levels:
The shift from traditional diets to processed foods, rising sedentary lifestyles, and rapid urbanisation are the primary drivers.
Sources: NFHS-5 (2019-21), ICMR-INDIAB Study, Lancet 2024
Cultural factors, prevention tips, and traditional wisdom for a healthier life.
Traditional diets were healthy — millets (ragi, jowar, bajra), whole grains, lentils, fresh vegetables, and spices like turmeric, ginger, and cumin. The problem today is the shift to refined flour (maida), white rice, deep-fried snacks, sugary drinks, and packaged foods.
Festival eating — Diwali sweets, Holi gujiyas, wedding feasts — calorie-dense foods are central to celebrations. Mindful moderation, not avoidance, is the key.
Urban vs. Rural: Urban Indians have 2-3x higher obesity rates due to desk jobs, reliance on delivery food, and lower physical activity. Rural obesity is rising too with mechanisation of farming.
Use all 12 calculators below for a comprehensive assessment. Each tool provides instant, colour-coded results with personalised recommendations.
Body Mass Index — primary obesity screening tool with Indian cutoffs.
Estimates body fat percentage using BMI and age.
Assesses abdominal obesity — a key risk factor for Indians.
Body Adiposity Index — estimates body fat using hip & height.
Determines body frame using height and wrist circumference.
Target weight based on height, sex, and frame size.
Basal Metabolic Rate — calories your body needs at rest (Mifflin-St Jeor).
Total daily calories based on BMR and activity level.
Estimated weeks to reach your goal weight.
Your non-fat weight (muscles, bones, organs).
Don't know your body fat %? Use Calculator #2 above.
Body Surface Area — used for drug dosing (Mosteller formula).
Personalised daily intake to reach your goal weight.
Used all 12 calculators? Great! Book a consultation with Dr Aravinda J for a comprehensive metabolic assessment and personalised treatment plan.
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