Body Weight & BSA Suite (IBW / AdjBW / BSA)
Body Weight & BSA Suite (IBW / AdjBW / BSA) - a deterministic tool in Sophie Well's Clinical Math & Conversions group.
Open the Body Weight & BSA Suite (IBW / AdjBW / BSA) → Runs in your browser. No signup, no tracking.
What this is
Compute the three body-size estimates clinicians actually dose against: ideal body weight (Devine formula - 50 / 45.5 kg for the first 60 inches plus 2.3 kg per inch over), adjusted body weight (IBW + 0.4 * (ABW - IBW)) for obese dosing of hydrophilic drugs, and body surface area (Mosteller: sqrt(height_cm * weight_kg / 3600)). Sophie Well returns all three from a single height / weight / sex input set with the formulas labeled inline.
When to use it
Use this when dosing weight-banded drugs that traditionally use IBW (aminoglycosides, theophylline, propofol induction) or adjusted body weight (vancomycin in obese patients, some chemotherapy), or when a BSA-based dose (chemotherapy, some pediatric oncology, cardiac index) is needed. The Devine formula is sex-specific and undefined below 60 inches; for short adults, use actual body weight or one of the variants noted in the citation block. BSA is independent of the IBW pathway.
References
Devine 1974 (IBW); 0.4 AdjBW rule; Mosteller NEJM 1987; Du Bois 1916.
Worked example: IBW ~70.5 kg; AdjBW ~76.3 kg; BSA Mosteller ~2.00 m^2; BSA Du Bois ~2.01 m^2.
Sophie Well is a reference and educational tool. Not medical, legal, or financial advice. Does not replace clinician judgment, professional billing review, or legal counsel.