Enter sex, height and actual body weight to calculate TBW, IBW, LBW and BMI — each drug below is then dosed on the correct weight scalar.

Formulas: IBW (Devine): Male = 50 + 2.3 × (Ht(in) − 60) | Female = 45.5 + 2.3 × (Ht(in) − 60)
LBW (Janmahasatian): Male = (9270 × TBW) / (6680 + 216 × BMI) | Female = (9270 × TBW) / (8780 + 244 × BMI)

⚠ Disclaimer: Doses are calculated from published weight-scalar recommendations for the morbidly obese and are provided for educational and clinical decision-support use only. Always confirm against local protocol and clinical judgement.