Calculator

Body mass index

New

Weight ÷ height². Asian cut-offs differ (overweight ≥ 23, obese ≥ 25 in Indian guidance).

kg
cm

BMI

24.2 kg/m²

Overweight (Asian cut-off)

Underweight
Normal (Asian cut-off)
Overweight (Asian cut-off)
Obese (Asian cut-off)

Formula

weight / pow(height / 100, 2)

References

  1. Mosteller RD. Simplified calculation of body-surface area. N Engl J Med 1987;317:1098.

Used in

Frailty and obesity in the surgical ICU patientDrug dosing in obesityEnergy and protein targetsVTE and stress ulcer prophylaxis

Calculators support, not replace, clinical judgement. Check inputs and units, and confirm doses with your unit protocol.