1: Age(yrs)

2: Sex
3: Height(cm)

ft
in
4: Weight(kg)

st
lb
BMI kg/m²
=
IBW kg
=Ideal Body Weight:
male: 50kg+2.3*(in>5ft)
female: 49kg+1.7*(in>5ft)
CBW kg
=Corrected Body Weight:
IBW+(Weight-IBW)*0.4 (if Wt>IBW)
10 15 20 25 30 35 40 45 50 55 60
  • <17 : underweight
  • 17<25: normal
  • 25<30: overweight
  • 30<35: obese
  • 35<40: severely obese
  • 40<45: morbidly obese
  • 45+ : super obese
BMI Target Diff
1 3.2kg
25 80kg
30 96kg
40 128kg
5: Crea(µmol/L)

eGFR (ml/min/1.73m²)
using Crea, Age, Gender
C-G²
²Cockcroft-Gault equation
also includes weight (link)
MDRD¹
(if black: ...)
¹Modification of Diet in Renal Disease
also includes ethnicity (link)
Gentamicin dose
for Corrected Body Weight = ...
CreaeGFR*mg/kgdose
* Cockcroft-Gault equation
For eGFR <30: use 80mg (60mg if wt <60kg)
and adjust frequency (e.g. every 48hrs)
as per 24h levels