Parenteral Nutrition (TPN) Macronutrient Calculator
Splits a calorie target into dextrose/protein/lipid grams.
What is Parenteral Nutrition (TPN) Macronutrient Calculator?
Splits a calorie target into dextrose/protein/lipid grams. Parenteral Nutrition is intended for use in: Adults.
How to Use the Parenteral Nutrition Calculator
- Enter Total calorie target in kcal/day.
- Enter % of calories from protein in %.
- Enter % of calories from lipid in %.
- Click Calculate to see your result and interpretation.
Formula & Version
This calculator uses formula version 1.0, last reviewed September 2026.
Clinical Considerations & Limitations
- A simplified starting-point calculation only — real TPN prescriptions must be reviewed by a pharmacist/dietitian and account for the specific lipid emulsion's actual caloric density (commonly 1.1-2.0 kcal/mL depending on product), fluid limits, and electrolyte/micronutrient additives, none of which are covered here.
References
- Standard parenteral macronutrient caloric values: dextrose 3.4 kcal/g, protein 4 kcal/g, lipid 9 kcal/g
Frequently Asked Questions
What is Parenteral Nutrition (TPN) Macronutrient Calculator?
Splits a calorie target into dextrose/protein/lipid grams.
Who is Parenteral Nutrition intended for?
Adults. Always confirm applicability to your specific patient before use.
What are the limitations of Parenteral Nutrition?
A simplified starting-point calculation only — real TPN prescriptions must be reviewed by a pharmacist/dietitian and account for the specific lipid emulsion's actual caloric density (commonly 1.1-2.0 kcal/mL depending on product), fluid limits, and electrolyte/micronutrient additives, none of which are covered here.
What formula or reference does Parenteral Nutrition use?
Standard parenteral macronutrient caloric values: dextrose 3.4 kcal/g, protein 4 kcal/g, lipid 9 kcal/g
Is Parenteral Nutrition a diagnosis?
No. Parenteral Nutrition produces a score or estimate to support clinical decision-making — it is not a diagnosis and should be interpreted alongside full clinical judgement.
