Calculator

Adjusted body weight

New

IBW + 0.4 × (actual − IBW). Used for some drug doses (e.g. aminoglycosides) and nutrition in obesity.

Sex

cm
kg

Adjusted body weight

83.6 kg

Formula

(sexBase + 0.91 * (height - 152.4)) + 0.4 * (weight - (sexBase + 0.91 * (height - 152.4)))

References

  1. Devine BJ. Gentamicin therapy. Drug Intell Clin Pharm 1974;8:650-5.

Used in

Drug dosing in AKIFrailty and obesity in the surgical ICU patientDrug dosing in obesityEnergy and protein targets

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