This version was machine-translated from German and has not been medically reviewed. The authoritative version is the German version.
Nitrogen balance
Intake (protein/6.25) minus losses – adult formula (+ 4 g) or pediatric formula in mg/kg (urea N × 1.25 + 75 mg/kg)
Calculation aid for healthcare professionals: the calculator reproduces what the sources cited assign to the inputs. Clinical assessment and every treatment decision remain with the treating physician. Inputs and results are not stored.
Frequently asked questions
Nitrogen balance: What does this calculator compute?
Calculates nitrogen balance from protein intake and urea nitrogen in 24-h urine: classic for adults (intake − (UUN + 4 g)) or by the pediatric formula (Yuniar 2025) in mg/kg/day (intake − (UUN × 1.25 + 75 mg/kg)).
Nitrogen balance: Which sources is this calculator based on?
Dickerson RN: Nitrogen Balance and Protein Requirements for Critically Ill Older Patients (Nutrients 8:226) (2016); Yuniar I, Lestari KA, Pudjiadi AH, Alatas FS, Devaera Y, et al.: Effect of postoperative enteral protein supplementation on nitrogen balance in critically ill children (Clin Exp Pediatr 68:790–800) (2025)