What are the official WHO BMI categories?

Why are there multiple Ideal Body Weight formulas?

Different medical researchers (Hamwi, Devine, Robinson, Miller) developed empirical regression models in the 1960s–1980s for clinical drug dosing and nutritional guidelines. Presenting all four provides a helpful historical and clinical perspective.

Does BMI apply to children and teens?

Children and teenagers (ages 2–20) use age- and sex-specific BMI growth percentiles rather than fixed adult BMI cutoff scores.

BMI & Ideal Body Weight Calculator