Question: how to calculate calories tpn?
Answer: An alternate method is to calculate all the kilocalories, add them up, and then divide total kcal/day by the weight in kg. Kilocalories (dextrose) + kilocalories (protein) + kilocalories (lipids) weight (kg) = kcal/kg/day from TPN. To determine the amount of electrolyte the infant is receiving: 1.