Surgical Nutrition Calculator

This enteral nutrition calculator may be used to calculate the appropriate tube feeding rate and supplemental protein required to meet a patient's particular nutritional needs. It assumes a daily caloric requirement of 30 kcal/kg and protein requirement of 1.5 g/kg for surgical and trauma patients (although these may be modified as desired). The calculations utilized to arrive at these rates are described below.


Patient Sex (choose one)
Male
Female
Height (in inches)
Admission Weight (in kilograms)
Caloric requirement (kcal/kg/day)
Protein requirement (gm/kg/day)
Propofol Dose (if applicable) (in mL/hr)
The lipid emulsion used in propofol provides 1.1 kcal/mL


Determination of Ideal and Adjusted Body Weight
If the patient is greater than 20% above ideal body weight (IBW), the adjusted body weight should be used in the calculation of enteral nutrition rates for surgical and trauma patients. IBW (using the Devine formula) and adjusted body weight (ABW) are derived as follows:

IBW (male) = 50 + (2.3 * (height [in inches] - 60))

IBW (female) = 45.5 + (2.3 * (height [in inches] - 60))

ABW = 0.25 * (actual body weight - IBW) + IBW