BMI
Body Mass Index
Short definition
Body mass index — mass (kg) / height² (m²).
Full definition
BMI = mass / height². Normal 18.5–24.9, 25–29.9 overweight, ≥30 obese. It is a crude index — it does not distinguish muscle from fat and may overestimate risk in athletes; used for screening.
Examples
BMI 27 at 90 kg, 1.80 m.