BMI Calculator
Calculate your Body Mass Index and find your weight category using WHO and Indian-specific cutoffs.
Indian-specific cutoffs: Overweight ≥23, Obese ≥25. WHO standard: Overweight ≥25, Obese ≥30.
BMI categories — WHO vs Indian standards
South Asians develop metabolic complications at lower BMI values than Western populations. Indian health authorities use lower cutoffs.
| BMI Range | WHO Category | Indian Category | Risk |
|---|---|---|---|
| <18.5 | Underweight | Underweight | Moderate |
| 18.5 – 22.9 | Normal weight | Normal weight | Low |
| 23.0 – 24.9 | Normal weight | Overweight | Moderate |
| 25.0 – 29.9 | Overweight | Obese Class I | High |
| ≥30.0 | Obese | Obese Class II+ | Very High |
Frequently asked questions
Why does India use different BMI cutoffs?
Research on South Asian populations shows that Indians accumulate more visceral (abdominal) fat at lower BMI values compared to Europeans. This leads to higher risk of type-2 diabetes, hypertension and cardiovascular disease at a BMI of 23, which is still "normal" by WHO standards. The Indian Council of Medical Research and WHO's South-East Asia regional office recommend the lower cutoffs.
Is BMI accurate for athletes and bodybuilders?
BMI does not distinguish between muscle and fat. A bodybuilder with very low body fat may have a BMI in the "obese" range due to muscle mass. For such individuals, body fat percentage measurement (DEXA scan, skinfold, or US Navy method) is a better indicator of health risk.
What is a healthy BMI for Indian adults?
For Indian adults, a BMI between 18.5 and 22.9 is generally considered healthy with the lowest risk of metabolic disease. Maintaining a BMI below 23 is especially important if you have a family history of diabetes or heart disease.
Does BMI apply to children?
BMI for children and teenagers is interpreted differently — it is plotted against age- and sex-specific growth charts as a percentile. A BMI calculator designed for adults should not be used for anyone under 18. Use the Child Growth Percentile tool on this site instead.
How often should I check my BMI?
For most healthy adults, checking BMI every 3–6 months is sufficient. If you are actively trying to lose or gain weight, monthly tracking alongside waist circumference and energy levels gives a more complete picture than BMI alone.