Nitrogen Balance Calculator
Calculate nitrogen balance from protein intake and 24-hour urinary urea nitrogen (UUN). Determine if a patient is in anabolic or catabolic state and find protein targets.
Medical Disclaimer
This calculator is for informational and educational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider before making decisions about your health. Never disregard professional medical advice or delay seeking it because of results from this tool.
Inputs
Results
Nitrogen balance (g N/day)
-1.2
How to Use This Calculator
- Enter the patient's daily protein intake in grams.
- Input the 24-hour Urinary Urea Nitrogen (UUN) from a timed urine collection.
- Enter insensible nitrogen losses (default 4 g/day is a common clinical estimate).
- Enter weight in kg for context.
- Review nitrogen balance — positive values indicate anabolism; negative values indicate catabolism.
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