BMI Calculator (with Asian/Indian cut-offs)
BMI is a quick screening number for adults, not a diagnosis. South Asian adults tend to carry health risks at a lower BMI, so we show both scales.
Rules and formula last checked on 10 October 2026.
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How it's calculated
- BMI = weight (kg) ÷ height (m)²
- 1 inch = 2.54 cm; 1 lb = 0.45359237 kg
Worked example
170 cm and 68 kg → BMI 23.5 (overweight on the Asian scale, healthy on the WHO scale).
Load this example into the calculatorAssumptions and limits
- Adults aged 18+, not pregnant.
- Asian cut-offs: normal 18.5–22.9, overweight 23–24.9, obesity ≥ 25.
Common questions
Why are the Indian BMI cut-offs lower?
Studies show South Asians develop diabetes and heart disease at lower BMIs than European populations, so an expert consultation recommended lower action points for Asian populations.