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Reading your body numbers

What BMI tells you, the WHO bands, and what the number cannot tell you.

3 min read

BMI is a quick screening number: your weight in kg divided by your height in metres, squared. Levlofit uses the WHO adult bands, the same as most BMI calculators.

BMI for adults (WHO)

Range (kg/m²)Band
14 to 18.5Underweight
18.5 to 25Normal
25 to 30Overweight
30 to 40Obese
[1]

23kg/m²

BMI from which health risk starts to rise for South Asian adults: aim for the lower half of the normal range[2]

BMI is good for

  • Quick screening
  • Tracking change in the same person

BMI misses

  • Muscle versus fat
  • Where fat is stored

Key points

  • Levlofit uses the WHO adult BMI bands.
  • For South Asian adults, health risk starts to rise from a BMI of 23.
  • BMI screens; it cannot tell muscle from fat.

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Sources

  1. [1] World Health Organization. Obesity: preventing and managing the global epidemic. WHO Technical Report Series 894. Geneva: WHO, 2000.
  2. [2] WHO Expert Consultation. Appropriate body-mass index for Asian populations and its implications for policy and intervention strategies. Lancet 2004;363:157-163.

General information from published guidelines, not medical advice, and not reviewed by a clinician. See a doctor for pain, illness, pregnancy or before hard training if you have a condition.